SIG MPX | Barrel Swap & Piston System Disassembly

[@alfredoverno9674]

great video. camera angle, lighting, sound, content, informational, dang Sir you made a great one.

[@kyle22686]

You are the patron saint of private gun owners my friend

[@shawnwillis7561]

Just tap it in, just tap it in. Just give it a little tappy. Tap tap tapparoo

[@jakepschirrer9150]

Go in your home. 😃

[@Dr.Shankenstein]

Guys please follow the manual when installing the barrel. tighten the screws back and forth until snug then use a torque wrench to tighten to 30-40 inch pounds (first screw then second screw then first screw again)

[@SetsunaKai5]

Just remember that different generations of MPXs have different torque values, the current generation is 30 inch-lbf as per the manual currently on sig's website

[@Dr.Shankenstein]

@@SetsunaKai5 you are correct I edited my comment the 60 inch lbs was for the 16" models. ILWT sells stronger screws than the factory. They recommend 45 inch lbs

[@CaptainGrief66]

This guy has so many cool toys, casually flexing on us with an M60 Man, do you have older gems as well? Oldest gun I've seen here is the M60 itself

[@armandgun]

Yeah I've got some ww1 and ww2 era guns as well. Just haven't brought them out yet.

[@steffeness1]

@@armandgun Can a guy cut a 16" barrel on the MPX to convert it to a 10" barrel without gas block issues? Will it cycle properly?

[@coreycollins5702]

The video would be a lot cooler if you were able to switch caliber, oh wait Sig says there isn’t enough interest for caliber change over, that they marketed the gun as in 2015. Considering how backed up on MPX orders the ability to change to .40 cal is asking too much. I’m not jaded about it, I’m just saying multiple calibers is one of the strong points to the platform.

[@jonathanwick5331]

Hello Arm&Gun! - Where did you get the interchangeable barrel from? Looking to do the same, I have a 16inch and want to go for the 8 or 4.5. Thanks in advance!

[@rap36case]

Check barrels at 'In Lead We Trust'. They have RH threads for suppressors. What is the precision difference in MOA between 4.5 and 8" barrels??

[@bryansride]

Nice video, thank you. What brand is that aluminum foregrip?

[@Hamaee]

What to do if barrel won’t come out ?

[@mbaleey8561]

curious, have you used any oil or solvent on the tappet, gas valve, or inside of the compartment in which they seated?

[@erickim7204]

Hi, can you put MPX 4.5 inch handguard in 8 inch barrel? I want to see how look good......

[@CaptMac-zw8mz]

Which threaded barrel would you recommend for the Sig MPX Copperhead w/ a 3.5” barrel? I saw some nice ones from In Lead We Trust. But they had multiple lengths to choose from. Thx!

[@Chuckinlead]

Where do you lube this gun/bolt? Is it like an ar?

[@griff6985]

Nice overview. Do people find that they lose their zero after removing and replacing the barrel/cleaning the piston?

[@robb9130]

Zero can be a smidge off after removing barrel. Really only need a click or 2 to be back on zero again though. So it’s not like you gotta go through the entire rezeroing process.

[@miles267]

What is the torque spec of the ILWT barrel?

[@SauzytheF33n]

Where can i find 8’ inch barrel

[@MSackman]

I know this video is 3 years old but can anyone answer this? Are the mpx barrels marked with just 9mm NATO? That’s the only markings on the 8” barrel. Thanks

[@ChrisShepley]

Due to potential legal exposure, I doubt either a g p ass cl9wbaxk, short piston, or l9ng pist9n d9es. But I do think the people near us are n9w cultivating. Even though through the gas piston system, the boly is not the MPX sight and s8ghts are no l9nger being compared in dearh, irons and red dot, I think you should get the aimpoint ar event.

[@laron702]

Is this a gen 2 mpx , and what kind of handguard do you have on the 4.5

[@Bloodreign137]

I’ve always wondered if a belt fed gun would be able to get around magazine bans. The law specifically says it cannot except a magazine with a capacity of over 10 rounds.. I’ve always read that is, a belt isn’t a magazine so I think you can do whatever you want with a belt. Would it be that was in Canada too?

[@doms1260]

Belts have to be limited to 10. Been chewed out a time or two for going above 10 rds

[@Marzman73]

Can you provide list of all your add on accessories ?

[@sifirid]

Question I have is where does the longer hand guard come from? Can’t seem to find them on sig sight

[@dobrzpe]

Midwest Industries has a couple for the MPX

[@casualtactician9537]

How do you get a hold of these firearms I have now seen a couple I can’t get a hold of

[@tommyguns4018]

who sells 8 inch barrel kits? i was just going to look into replacing my 4.5. thanks

[@FrankyGamarra]

What would be the advantage? Why not just get a silencer, and keep it relatively “compact”?

[@armandgun]

IMO the 4.5" is more desirable. You get a little more velocity out of the 8", but I got the 4.5" to replace mine. My gun started as an 8", so I got the 4.5" kit. Not sure if Sig still offers the 8".

[@vernievuitton]

I've got an 8" barrel and handguard on mine if you'd like to trade!

[@SauzytheF33n]

@@vernievuittonif he has not traded with you i would!

[@chodiusmaximus4042]

what iron sights are those? i just bought a MPX-K and it has no iron sights. I'm stuck using a shitty $30 spare red dot i have. Also what type of red dot sight is that?

[@joshbeideman5021]

Where did you get the hand guard for the 8” barrel

[@Livefreeordie907]

You can order them straight from sig

[@bramsltd]

Great build! Is there a QD suppressor that would work with that compensator?

[@monarchco]

no.

[@knighthawk6633]

WARNING - read before you purchase. Test your ILWT barrel to ensure that ammo feeds correctly. Mine did not because of a high feedramp. ILWT is 0.060” compared to the OEM 0.035””. The higher feedramp resulted in bullets nose diving into the base of the feedramp and not onto the feedramp resulting in stoppage. Because I let the gun sit in my safe for a year and did not identify and report earlier, ILWT won’t work the issue and I am required to make Dremel modifications to correct the geometry of the feedramps to allow seamless feeding and function. I highly recommend identifying the issue early and brining it to ILWT’s attention or else you too will have to break out the Dremel.

[@pacodelfuego]

I emailed ILWT months ago about this exact concern while considering buying one of their barrels and they never responded. If there was anyone else making a machined tri-lug barrel for the MPX, I'd buy from them instead of ILWT, but unfortunately ILWT seems to be the only option.

[@canyouseewhatisee3671]

Not torqued to 60lbs?

[@ayyyota]

40 for the MPX (unless it has changed recently on the K variants). MCX is 60 - maybe that's what you're thinking.

[@canyouseewhatisee3671]

Chris Sommers thanks for replying,I was thinking MCX,I enjoy your content

[@davidcaffrey1072]

Pretty sure thier 27 t on the torx for barrel

[@blacknight19832]

Where can I get the 8” barrel?

[@Waynethegunner]

Gunbroker

[@TeraQuad]

Badass! What is the brake on the short barrel?

[@armandgun]

Lantac Dragon

[@TeraQuad]

@@armandgun Thank you, sir!

[@MyPrestigeLife]

Who makes this hand stop on the hand guard

[@armandgun]

Aeroknox

[@CaptMac-zw8mz]

Check out In Lead We Trust for a nice threaded barrel and go suppressed. 😉

[@betterway7339]

If the pistol braces become banned, plan b is to buy a 16 in barrel and rewatch this video.

[@toontaloon2720]

where i can find the 8" barrel ?? In my country they only have 4.5" barrel

[@TheLilrichard123]

In lead we trust barrel website i believe

[@jlau317]

Still waiting on the ORIGiN

[@armandgun]

Me too. Fostech is really backed up on orders.

[@seek3n]

My mpx copperhead can't even land on a human sized paper at 50 yard. Called sig. They said is a pistol what did you expect... I expect at least same accuracy than my glock...😭

[@apexaustriae9973]

Got an MPX K 4.5" one month ago. Best it can do with match grade ammo is 2.5"@25yds. Can't re-sell it for what I paid, so apparently I'll be stuck with it. 😔

[@libertiesbreathe5014]

Dude seriously how do you have all of these guns still after the assault weapons ban your minister just passed

[@IR-xy3ij]

He's had all them before the ban

[@funnyjuk]

the buyback program won't happen for another 1.5 years or so. it's an amnesty period.

[@AKay4tothe7]

Collapsible stock, please.

[@armandgun]

It's on the rattler right now.

[@SR-71_]

How do you even hold the first build

[@feraligatorade99]

Magwell grip maybe?

[@Livefreeordie907]

There actually isn’t different calibers, they designed it to have different calibers but they never built them. Call sig and ask if you don’t believe me

[@Vodwuar]

My drill sgt flooded back to me and first thing I see is your weapons not on safe… great video otherwise lol

[@ShirleeCassady-v3b]

Garcia Kimberly Lee Kimberly Johnson Ruth

[@AllanButchar-i4m]

Harris Dorothy Johnson Frank Rodriguez Patricia

[@dustinbrosmer6164]

First lol