Holosun 507K

Aaron reviews the new 507K compact RDS from Holosun

[@RenoMay]

Your optics reviews are my first stop any time I’m curious about an optic.

[@jortega456]

To anyone looking for a solid 2A content creator, check out this guy Reno May. This guy f*cks!

[@anonypersona3189]

100% agree. Amazing top-tier content.

[@frogchaser]

Yea same. His RMR type 2 test was insane.

[@prone_wolf8871]

Yep

[@HughJorgan09]

Aaron's become my go-to, as far as optics reviews. I'll be receiving my Armed Security license, in a couple of weeks, and, will then become a first-time gun owner. Wanting to make a wise, informed decision, I'm watching a wide range of information on KZbin, and, it's become easy to determine that Aaron's analysis skills are top-notch, entertaining, informative, and professional.

[@swampk9]

Never clicked on a video so fast in my life

[@i23d]

amen

[@bd03]

Amen lol

[@richmackey7631]

Truth

[@DonnyBrook762]

Already in my Optics Planet cart and the intro music is still playing.

[@dfallat14]

I've been waiting for mine for so long, I just want it on my gun already

[@floydrogers931]

I carry a Sig P365XL. I have been wanting the 507K for a while now. Walked into my gun range on July 1st and they had one in the case. Cost was 299 with free installation and zeroed. My credit card jumped out of my wallet before I knew it. Very happy with my gun and now the RDS.

[@redneckninja2539]

Just bought 365 xl, simply for how it felt in my hand. Are you able to have iron sights with the red dot?

[@floydrogers931]

The iron sights co-witness. The rear sight is on the Holosun now.

[@code_red7744]

Just got my 507k from a Lgs for $229 and they are selling for $500 on eBay right now.

[@StraitClownin909]

@@redneckninja2539 if you actually bought a 365xl you should know the answer to this question.

[@redneckninja2539]

@@StraitClownin909 when I wrote that I had just walked in the house with the 365xl and hadn't seen in person the 507k. It's on the gun now

[@ssgslaughter4639]

Dude your review is the ONLY one I’ve been waiting for on the 507k since shot show. I knew it was good as soon as I saw that first shot at 25yards after the 4th drop. I’ve wanted this sight for so long but wouldn’t put it on a CC pistol until it got the thumbs up from you. Keep up the great work. You’re doing amazing things for the average people who only buy 1 new gun a year to fill a perceived need.

[@unashamedly1776]

Been waiting for this review almost as long as I've been waiting for Optics Planet to ship the 507K

[@patrickmurphy8008]

I stopped doing business with them because they'd take months to send stuff that is "in stock"

[@hcctlive6475]

I took the chance while they actually still had stock 😁. I figured this review would come through and prove my confirmation bias anyway!

[@unashamedly1776]

@@hcctlive6475 when have they had them in stock?

[@hcctlive6475]

@@unashamedly1776 about 6 weeks ago

[@2ndamendment115]

Patrick Murphy me too rather pay more on amazon and get it in 2 days

[@kimm8491]

I saw this notification and have been waiting for someone to review it. I’m glad I’m watching yours first!!! Thank you!

[@davidli3582]

At this point Sage Dynamics' review is THE review when it comes to pistol red dots.

[@kimm8491]

David Li completely agree. It’s great to see heavier testing even when I don’t intend on using it for duty use.

[@deadeye5155]

Damn drop it again and tighten up that group even more!

[@blakehillusmc]

🤣🤣

[@cembor]

The 507/407k were designed specifically with the P365XL in mind. The mounting on a 365XL removes the rear sight so the minimal one on the optic body acts as the backup sight in that specific application.

[@bc_usa]

No it wasn't. Lol it was made for the Glock 43X snowflake.

[@danny12904]

Which one did you pick

[@cembor]

@@danny12904 I got a smokin' deal on a Romeo Zero so went with that.

[@stevep7608]

Trijicon is so upset that you broke the SRO, they are trying to ban Holosun in this country.

[@ericmpena]

Just the review that I was hoping for. I replaced my fragile Shield RMSc with a new 507k. I already felt confident about making the switch, but this makes me feel just that much better. Thanks for your awesome reviews!

[@swiftaudi]

Love the rmsc but your right is so fragile and not cheap for being fragile.

[@mikelivingston319]

That's what I hate about the rmsc, its durability doesn't meet it's price point

[@scottsummers6357]

The shield was a real disappointment for me, and not a cheap lesson.

[@Fishin4funout4trout]

Was that on a Hellcat, might I ask? If so, did you have to get it milled to fit the 507k on?

[@ericmpena]

@@Fishin4funout4trout No, my 507k went on a CZ P-01. I did have the slide milled for it. Still working perfectly to this day.

[@taylormazarky6561]

Was recommended to you by a local gun shop that told me to go home and watch some of your videos so i can make a more educated decision, (i’ve just turned 21 and gotten into carry) and i must say you deserve more credit for the fine work you do, very well spoken and every test is exactly something we were hoping to see, i will be returning to the shop on my next day off to pick up the holosun 507k for my newley purchased hellcat osp.

[@kanaka118446]

Props to that shop for encouraging an educated purchase and even more props for it being Sage. Hope all is well

[@joemo1033]

Been waiting for this. Thanks for all the hard work Aaron.

[@malekodesouza7255]

I bought a 407k for my off-duty carry, which is a new to me 43X. I had been carrying a SW Shield. I wanted the larger MOA dot as my eyesight ain’t what it used to be. My Dept only approved the Leupold & RMR for on- duty use. But the $600+ for the RMRcc is ridiculous and I dislike the having to remove the entire unit for battery change. After watching this I’m even more happy with my decision. Seems rugged and meets all my requirements. Thanks. I appreciate the real world testing and I’ll follow your channel here on out.

[@000one]

This guy might be the best source for the product review that he is doing/testing. I’ll just say it, maybe on the entire net. Another fantastic review with everything covered.

[@Bulldog75stp]

I'm not sure which I'm more anxious for. Getting a notification saying my 507K is being shipped or a notification stating my 43x build from Agency is complete. :D

[@thinktwicespeakonce482]

I'm in the same boat. Have my slide for my 48 being cut and the 507k should ship this month.

[@taylormartin4346]

Optics Planet 'bout that 5-8 week ship time huh haha....same.

[@greghurdle4021]

This will be a great option for hammer fired CZ guns as well because of the narrower slide on the classic CZ 75 variants!!!

[@Cordova10-8]

@Emmanuel Goldstein Right, the RMR is just fine for full sized handguns. The K line is right at home on micro guns.

[@rhaynesify]

Emmanuel Goldstein the slide is to narrow and you need to use a 1911 plate in order for it to work. This will avoid that problem and allow the optic to sit lower.

[@titanscerw]

Same goes for TDA Berettas!

[@jeremyforresttalley145]

I am planning to get my P07milled for the 507k. Cowitness with factory sights too which is awesome!

[@Murphy82nd]

The P365XL has an optics plate that includes the rear sight, so adding an optic loses the rear sight. The rear sight on this would give you something.

[@RidersRange]

Murphy82nd, I have the Holosun 507K on my 365XL. I’m wrapping up my 1,000 round test and will have the video review out in a week or so.

[@itemps]

@@RidersRange I dig mine on my xl, cant wait for the 1000rd review though.

[@d.wilson1402]

Can't wait for mine

[@garyj449]

@@RidersRange I'm super interested in that. I ended up getting an adapter plate and put the 507c on my p365 XL instead. That's because everywhere I looked said I'd be waiting 3 months to get my hands on a 507k. It's not that much bigger and I like it. I have just over 500 rounds on it. I still want to switch back over when I get the chance to purchase a 507k.

[@redneckninja2539]

Well shit, I just asked another commenter that very question, just bought 365 xl today. Picked it up, felt right in the hand . Was smoking over a dot sight option

[@rohawaha]

Three years later and still relevant and very valuable information to the American shooting community , this is the optic I will purchase for the two Springfield Hellcats I purchased for myself and my wife " we are a tactical team and train as such " . Then come Christmas , I plan to gift Springfield Hellcats with the 507k to each of my three adult daughters who have children to protect. All thee daughters have been firearms training since their teens and have CCP's. Thank you for all the work and expense involved in the testing and work to make this video.

[@AVD-og9fr]

Holy shit, finally a review with standards. I've been waiting on the 407k since Shot Show, preorderd the day OP put on website and still anxiously awaiting.

[@mattconklin4026]

Did you get it?

[@AVD-og9fr]

@@mattconklin4026 Yes sir. From another vendor.

[@mattconklin4026]

@@AVD-og9fr how's it been holding up?

[@deputydog5261]

Never liked optics on my Glock because I just can’t pick them up, so it’s slower. However this 507k, although it is smaller, fixes that. I find the dot each and every time without changing my presentation at all. Thanks for the review. This is the one and only red dot for me.

[@brockedandloaded6034]

The answer isn't irons, it's train with the dot. Irons are slower to acquire than nothing, but we trained with them. If you can't find the dot train it.

[@robertfoote3255]

When you want to know about a new optic....this is the place you will learn all you need to know about it....🤠 Thanks Aaron!

[@01-MBTECH]

It’s pleasure to watch, I loved every minute of it. Your opinion is valued. Thank you sir for your efforts.

[@NoLimitHonky]

Been on the fence about putting an optic on my 365XL... the battery side-load and the "mini" Donut of Death reticle seals it for me. Will be my first Holosun purchase, looking forward to it. Another great review by Aaron!

[@DanielBoone337]

Holosun never ceases to amaze me with the quality of their optics especially when you look at the price tags of other options out there!!!

[@Strawman333]

Made in China keeps the price highly competitive. If these were made in the U.S.of A, they’d be twice the cost.

[@surfingtothestars]

That slave labor in China helps that price a lot

[@ShitboxFlyer]

@@surfingtothestars Those slaves make a great product

[@mr.pattyd9138]

My only suggestion would be to consider the 407K if you don't want/need the circle-dot reticle, and are willing to accept a 6-MOA dot instead of the 2-MOA on the 507K. The 407K is about $80 cheaper and is functionally and size-wise the same as the 507K, just with a 6-MOA dot only.

[@Baertrs1911]

Great review. Thank you. I put this on a 365XL. I like the optic a lot. I really like the circle around the dot. It helps older eyes quite a bit.

[@mrsickwick]

Been waiting on this review for a long time now and it was worth the wait. SageDynamics never *EVER* disappoints!

[@DossFarm]

Found you through Honest Outlaw. Good stuff. Owned glocks for years. Got my first Glock 45 & 43x with an RMR. Came hear to learn. Thank you sir 👊🏻

[@kzoojason76]

I’ve been waiting for this review!! Glad to see it lived up to the standard. Now I need to decide if I want to get my 43x milled.

[@andrewdryden4148]

Great review, you kept it moving and relevant but also added lots of supporting details and/or evidence to give the viewer a good idea of what to expect. Thanks man!

[@AlphaRomeoOneFive]

Between your videos and Holosun's continued proven durability it makes me want to take up stock in the company! Excellent and thorough review as always, thanks Aaron 🇺🇸

[@mikeyoung4231]

Have one on my glock 41, full size, .45 edc, love it, installed myself

[@egonpax]

6:17 jazz hands! Solid content as usual

[@thetuckers5156]

Going back in time. Arron you will create a new category… me sending vibes to the past.

[@El-ahrairah-lc3tg]

I’ve been interested in this optic since hearing about it early on but have been waiting for an in depth review such as yours. Glad it held up and thanks for the info and great video.

[@Brykk]

The circle dot reticle also helps those of us in mitigating some of the issues that arise from astigmatism. A plain red dot appears as several dots to my eye, where the circle dot shows up normally and crisp.

[@wilkiebraten1565]

Thank You again Aaron! Great review as always! Keep your standards high and waiver them for no product!

[@coloradogrownHD]

Just picked up a hellcat with the holosun 507k installed on it already and love it. Can’t won’t to shoot the gun. Holosun has gained a fan!

[@Gilgamesh347]

Simple video title (no clickbait) is much appreciated. The information delivery style is no-nonsense and reasonable, unlike so many others. Subscribed.

[@hcctlive6475]

I went with the 407K on the Canik elite sc. Only difference is that the 407 is dot only which is my preference. Thanks for turning me onto optics, it's been a game changer 👍👏

[@Cordova10-8]

That's a 6 moa only, right? How do you like it? I'm used to a 2 moa dot.

[@hcctlive6475]

@@Cordova10-8 The 407's have 2, 3 and 6 MOA dots. Mine is the 2 MOA 👍 Also can get green or red dot. Only difference from the 507 is there is Only the dot.

[@ES44AC-2]

I'm glad you tested it this way, perfect! I believe it performed very well!

[@frankanusky3095]

Just received my 507k for my sig365xl. Thanks for your info. Learn something every-time i watch your videos. Thanks!!

[@1clnsdime1]

The notch on the 365xl slide works perfect. I was glad to see that since I had to remove the rear site.

[@iangavin631]

I was about to have my 43x milled for a RMSc, glad I saw this review first!!

[@ryansieks2026]

The rmsc has the same footprint as the 507k.

[@SticksBlog]

@@ryansieks2026 The k series only has front lugs, and they are just a bit shallower than the rmsc. If you are going to get your slide milled, get it milled to fit the k series, not the rmsc. This will allow you to be able to fit any of the micro red dots currently available, but if you get it milled for the rmsc you won't be able to mount the k series.

[@406Montana]

Thanks for the review. I just ordered one to replace my Shield on my G48. At the time it was the only option that an old man had to put red dots on both my G43 and 48.

[@eltanman]

The gold standard in red dot testing. Drop accordingly 🤙

[@BoostedFrancisco]

Holosun is doing amazing things in the industry. I might just sell all my red dots and swap over to Holosun. Thanks for another awesome review.

[@nbates9893]

I'm running them on my handguns and short rifles man. No complaints. I like the 508 better than the rmr to be honest.

[@bobg1443]

I’ve been looking for something to replace the Shield RMSc that came with my M&P 45 Shield, since I had to send it back to the UK because the lens was totally scratched. If this has the same footprint then I’m going to pick one up for sure. Thanks for this no BS review.

[@FyrFytr998]

I'm glad you maintained your standard of testing. Some people might wind up in a fighting situation with these micro dots, and it's good to know if they are at least capable of surviving a hard fight.

[@callsignteach1062]

Had my first accidental "drop test" the other day. Carrying it in the house from my car and slipped out, landed right on the back corner of my 407c. Only damage was a bit of the finish chipped. Your drop tests are justifiable from shoulder hights in my opinion.

[@callsignteach1062]

@WITE FOX hey man... yeah... it was held in my armpit cuz my hands were full and I was going inside my house from the car but ill be sure to practice that more. Thanks for the advise 😉👍

[@callsignteach1062]

It really does. His drop tests aren't practical at shoulder height but at a rare circumstance can happen. Had i not seen his review on the SRO that prob would have been on the pistol and id be out of $600+

[@TheChadavis33]

A lot of guys are throwing these on home defence shotguns because of how durable and zeroed they are. Says a lot Great video, very informative 👊🏻

[@max521993]

Got the 507k on my mossberg 940 pro tactical for home defense, very good optic!!

[@Tainomontana]

I see a Holosun in my future 💯

[@Tainomontana]

I’ve always been loyal to Aimpoint but at this point (no pun intended) Holosun has proven it self by surviving all the testing Sagedynamics has put them thru over time.

[@eld2349]

Just put a 507k on my Echelon and love it. Size wise is just right, and the open 32 moa circle is perfect for me.

[@stevesummerford3690]

Bought a Trijicon RMR2 for my P10S (subcompact), but these Holosun offerings are doing pretty well! Thanks for another great review, and putting this Red Dot through the same paces and eliminating any doubt of it’s potential performance.

[@KendrasEdge757]

“It’s my test and not yours!” 😩 😩 😭 😂 😂 😂

[@EddieLindsay681]

Nice to see it held up, now I just have to wait for my backorder to ship.

[@maxzulu]

Got the 407k on pre order. Wanted the 6moa for only. This will fit right into my 365xl. Very excited

[@wncoulte]

Anyone looking for an RDS, I send them here cause everyone knows Aaron's going to beat the ever-lovin crap out of his red dots. I bought my Trijicon RMR Type 2 after his torture test.

[@f308gtb1977]

I’m an RMR snob, but Holosun definitely deserves some respect.

[@scottamy6496]

Just picked up a new Sig Sauer P365X, but I didn't get the model with the Romeo Zero and plan on getting the Holosun 507K, this video definitely reaffirmed my decision!

[@scottamy6496]

I ended up going with the Holosun 407K instead of the 507K, I prefer the 6 MOA dot for a defensive pistol and it's been fantastic!

[@chiefro7]

Oh man, had me concerned it wasn’t going to get the “full treatment”. Glad that concern ended up being unwarranted. Lmao

[@lanceskopik2928]

I love the dry black and white logic . Keep it up my man

[@douglasrjohnson1]

Great review and perspective, thanks. Last week I ordered the 507k for my new 365XL as a carry gun, so I feel great about my choice after watching your review! Now just waiting on a 3-4 week backorder, like a kid before Christmas....

[@THPOOKY]

Thank you Aaron been waiting for you to review this one!

[@CaveWyatt]

LOL! Mine made it onto my P365XL and a crude sighting in and seemed fine. Due to crap weather this winter I decided to carry something else in the pocket of my heavy coat. Last Friday I finally got nice enough weather and had nothing else going on so I’m loading up to go to the range and, in the transfer from the gun bag I put it in about 6 weeks before hoping good weather was around the corner to the big range bag it slipped out and fell onto the dining room table. Then to the floor. And that’s what Aaron is talking about when he says anything can happen. When I got to the range I had no reticle. Brought it home and got a new battery over the weekend and…still no red light. Now we’ll find out how good the warranty is. I’m sure it will be fine.

[@Mrgunsngear]

Great info

[@bigmike716]

Which would you recommend for someone just starting red dots on pistols, the 507C X2 or the 507K??? Or any other brand you may prefer. I just bought the MR920. Absolutely love it. looking for an optic.

[@bigmike716]

@SPQR - Canik TP9 Elite Combat Executive

[@stephen_crumley]

@@bigmike716 go with the 507C X2 over the K model. I believe the plate #2 is the one for the footprint of the 507C, which is the RMR footprint, you could go with a Type 2 RMR instead of a 507c x2. The rmr is bombproof but it’s $100-$200 more than the 507c but again it’s gonna last the rest of your life. Since your gun is not the micro size of a 365xl or hellcat I would take advantage of the larger window and overall larger optic of the 507c or type 2 rmr size. I have a 507k on a 365xl and it’s a fkin fantastic product. Holosun makes several other pistol dot sights besides the 507C also, there’s the 508T the 509 but again, they are close to the cost of a Trijicon rmr

[@MaxwellAerialPhotography]

I’m pretty sure Mikes keyboard only has 9 letter keys. That’s all he ever seems to write in the comments.

[@detectivedun3058]

i love looking at the wood post he uses. you can see how chewed up it is from all of his testing haha. But, I have this sight on my P320 XFive Legion and i LOVE it!

[@RJGuitz]

Aaron has an Agency Glock for every optic out there.

[@davidadams7539]

This its his job and he works with agency if course he's going to get equipment it's free advertising and he is a big reason they're able to charge you $950 for a blank slide and more than a thousand to modify your gun still using STOCK INTERNALLY.. well minus a trigger shoe.. I think they have a healthy and profitable relationship myself! I'm a little envious of it. But HE'S the right man for the job.

[@sickmak90]

I own a 507k and a 407k. Even with astigmatism I like the 407k’s 6moa dot better. It’s actually crisper to me because I can lower the brightness more than the 2moa dot.

[@mdotto8707]

Great review!! I'm going to put a 507K on my new G43X. Thank you for all you do!

[@blakehillusmc]

I have watch so many of your videos. You are my go to reviewer. Thank you!

[@Jtkc5018]

Glad I found this video! I'm dropping my g19 slide off at Jagerwerks Monday morning and having it cut for the 507k. I was going to go with the 507c, but I like the profile of the k better, and I can still use the aftermarket sights I already have. Plus the 507k shares the eps footprint if I ever decide to go that route.

[@mattsterpiecenjmaflva9956]

Just ordered one yesterday for my 43X. Let’s go!

[@Prepare2Survive]

Just added one to a Gen 5 G26 MOS with the DPP adapter plate and it fits perfect. Seems like a perfect size for a small G26

[@jshea]

The Sig P365XL is an example of a gun that doesn't have a rear sight when the optic mounting plate is removed. It's already cut for the 507K, so the crude rear sight included with the 507K is a nice feature for this gun.

[@jayphillips368]

Awesome, what I have come to expect from Holosun. Will be putting it on my P365XL and Hellcat

[@mytquin7605]

holosun has come a long way. i own several with zero issues.

[@mandodelorian4668]

Love these reviews Aaron, thanks a bunch!

[@DanTheWolfman]

I haven't gotten into RDS yet, but pairing this Holosun 507K with a 365XL, extended mags, and TLR8AG or PLMini 2, rail adapter, seems like a very successful easy to carry combo....that's a lot to save up for.

[@QwikSilva7]

Just found this review. Great job brother! I use the 507 for work so was wondering about this for my Hellcat Pro for concealed carry. Great testing procedure imo. Thanks again brother. Stay safe!

[@bfrusso1]

Thank you for what you do. It is always extremely helpful before I make a purchase.

[@HeartofTexasArmory]

Thanks young man! Glad to see it made it through the 2000 round test!

[@markpope2949]

Am happpy with my 507TGR on my new ZEV// Custom built on a Glock Gen3 frame. WORKS SPECTACULARLY. Am planning to buy a P365XL and mount a 507K WHENEVER they produce them in GREEN and with a TITANIUM BODY.

[@sinnerfreaky]

OMG, I've been hesitant to get my 43x milled for an optic cut... was thinking Suarez, but no military discount... Thanks for this review and the tip on Agency Arms for slide work.

[@meee175]

Just swap it with a Zaffiri Precision slide that's cut. I have 3 or 4 of them for my 19's.

[@williamthompson9262]

The 365xl would need that back up notch since you loose you’re rear sight with the mount

[@nc_classics9767]

Keep your eyes on CHPWS Plates. They include a Dovetail on their plates for Sigs. They are developing a 507k plate.

[@GeauxRussGeaux]

*LOSE

[@shmike3775]

@Emmanuel Goldstein go be old somewhere else

[@ryanhill4918]

I really like holosun but they need to chill out with all the logos they put on their optics. Seriously they put HOLOSUN in big block letters on all three sides of this optic. Looks like shit

[@paulstella8443]

I wish the letters were even larger and that they glowed

[@mrcruz7459]

He’s reviewing the pre production model of the 507k .If you look at holosun website they eliminated the brand logo on the top of the optic .Holosun kept the brand logo only on the right side of optic (opposite of buttons).

[@ryanhill4918]

Even so, you look at other big players in the optics game and their branding is usually much more subtle and refined. It looks much more professional.

[@mrcruz7459]

Ryan Hill I will have to agree with you on that .

[@ryant5652]

Alcohol swab and some elbow grease will take it off

[@zacharyread5303]

If you would, could you test the swampfox sentinel as well? I'm curious about the durability of that sight

[@rockchalk06]

Goes in the holster tomorrow morning. Waiting for you to beat the shit out of it first. Thank you brother!

[@miltonoliver3705]

Booze and sage dynamics nice start to the weekend

[@mrbojangles4155]

Best reviewer on the interwebs!

[@rocketmanrsr]

"Plain clothes duty" I hate when that happens.

[@jedyoung8359]

🤣

[@MyLonewolf25]

I love when it happens I make a loooot more money

[@egonpax]

🤣🤣

[@snowgorilla9789]

Thank you again for your time and effort to inform us

[@kayak118]

Thanks for this Aaron! You sound a little down, or maybe under the weather. I hope you're back to your old self in no time! ✌️😁

[@countryfanatical]

Another vote for a vid on the Swampfox Sentinal, curious to see how it does

[@countryfanatical]

@@Pler1978 I actually ended up buying one of the sentinels, seems pretty sturdy upon my handling. especially with their Ironsides. Though I’m waiting on my slide from the machine shop, so I’ve yet to mount it

[@mikemazz8838]

Great review. Thanks for the time it takes to get these done.

[@harolddurham3317]

Great info on the 507k just purchased one should receive it this weekend.

[@tonyz5307]

The rear notch is likely targeted at the Sig P365XL, which losesw it's rear sight when the red dot is installed. Note that the Romeo Zero also has the notch for that reason. Good review as always. Cheers, Tony

[@aaronthomas382]

Sweet, I’ve been waiting for your review to put one on my 43x, and I’m sure I’m not the only person.

[@mattconklin4026]

Did you put one on the 43x?

[@rmoore4yris]

Been waiting for mine to be shipped. I got a dovetail plate just because this 507k has a sight. Which saves me some cash.

[@herrero562]

Great video as usual. My P365 is already cut for and waiting for planet O to ship my 507k. Thanks for what you do.