HK MR556 A4 Update 4...the Zero

[@larrysimpson1129]

Thanks so much for being one of the only people putting content up this past week for these updated rifles hope to pick up the 11' sometime next year

[@HKShootingwithDerekG]

The 11 is going to be a real “honey”!!!!🎉🎉

[@SG-LLCtraining]

Thanks for the uploads. I’ve got two 16”’s coming to the shop and one is going to be mine lol.

[@MiguelGebremedhin]

Do you mind sharing what store? I really wanna get one myself

[@HKShootingwithDerekG]

Thanks for the comment! You are going to love it! Congratulations and be sure the other one finds a nice home!!!!😊

[@MattDapson]

Thanks for info on this rifle. I have an A1 and mulling over an A4. The old want vs need. That said, having always stuck with high-end firearms has been positive for me. For the few I’ve sold, I’ve always gotten good money for them.

[@HKShootingwithDerekG]

@@MattDapson nothing wrong with the A1! You might consider the 11” as a new addition

[@fire_for_effect]

Just finished my 556 A4 build. Can confirm 10 round 1 MOA group off a tripod with arca rail using 55gr. PMC X-tac ammo. Schmidt Bender short dot CC Optic and flow 556K can

[@fire_for_effect]

Took it out again today. Solid at 600 yds. on tripod. 13 yr. Old son was ringing steel with me

[@LocaliLLocano]

When the upper goes on sale I’ll pick one up. There’s tweaks I’ll make but to be this close to the 416 is impressive

[@rogerevans3112]

Looks like the RBGC range

[@HKShootingwithDerekG]

We have a BINGO!

[@davismathis845]

Gotta love RBGC!!!

[@MichaelSmith-lf6yc]

Is their semi bcg similar to that which comes in some generic rifles

[@HKShootingwithDerekG]

No

[@NebraskaB]

Are you able to review / compare the pistol to the full length version?

[@HKShootingwithDerekG]

@@NebraskaB coming

[@NebraskaB]

If you talk with HK… suggest a FDE or Ral 8000 color.

[@crazedmonkeymonk]

What did you have to do to remove the muzzle device? Mine is extremely difficult to remove.

[@MieseRinde-n6i]

How thick is the barrel before and after the throttle?

[@K-bob_45]

Can any other charging handle be dropped in? That thing looks huge

[@HKShootingwithDerekG]

Absolutely.....put your favorite in there and you are good to go! It is not a proprietary charging handle.

[@HKShootingwithDerekG]

Oh, and I agree...it is a little large and I plan to add a smaller handle just to reduce snag chances when using it for 5/10k run and gun biathlons

[@MattDapson]

Hi. Might you know if the stock from the A4 fits the A1 buffer tube? I’ve read some conflicting info on the topic. I did buy an A4 with the 16.5” barrel (comes Thursday). I have a few SBRs so not waiting for the 11” version. Enjoying your content on the rifle.

[@HKShootingwithDerekG]

yes, it will fit. Both use a mil spec buffer tube

[@carwizard3672]

Please tell me if the MR556A4 is able to accept A1 416 style quad rails!?

[@HKShootingwithDerekG]

@@carwizard3672 yes, absolutely they fit

[@carwizard3672]

@ booyahhhh! Definitely looking to get an 11 inch and make it a 416 A5 look with the quad rail! Thank you for your quick response

[@HKShootingwithDerekG]

@ bahbahbooyah! Load da boat! 11 for the win!

[@martinmartell2252]

Are all MR556s this accurate?

[@HKShootingwithDerekG]

@@martinmartell2252 I’ve had them and used them hard since they first came out in approximately 2010. Every MR556 I’ve had including many upper kits has been this accurate or more. The original blow pig MRs with the heavy contour barrel produced ridiculously small groups that really only matter to a precision shooter or bench guy as this barrel on the A4 is precise and importantly a usable weight.

[@martinmartell2252]

@@HKShootingwithDerekG thank you Derek, for the response and the awesome videos!

[@FULLASSAULTChannel]

I hope not, a 4 shot 1” group with match ammo & a bench is pretty mediocre.

[@tsim4139]

The only problem I have is that it's not easily converted for any AR trigger or full auto

[@HKShootingwithDerekG]

@@tsim4139 the MR556 takes many triggers….just be sure m16 tall hammer…..these aren’t intended to be auto rifles as commercial market products

[@dansmajd4105]

No chrome needed, which is why the 416 has a chrome barrel. Got it.

[@HKShootingwithDerekG]

here we go! The 416 is chromed for mil use....very few commercial "operators" will be taking their MR556s through salt marshes, mud, and more while then going long periods without cleaning from harsh conditions or corrosive ammo.....the good news is for the chrome domers out there is..... lots of other uppers available for various manufacturers that have the "chrome" they need!

[@dansmajd4105]

​@@HKShootingwithDerekG Yes, the mr556 is not a hard use gun, i'm aware of that.

[@dansmajd4105]

@@HKShootingwithDerekG plus it's not about salt. it's about rapid heating and cooling cycles, to which nitriding is just less tolerant. chrome is very hard to kill with heat.

[@dansmajd4105]

@@HKShootingwithDerekG I don't mean to hate! I just don't see the value in a $4k gun that will not last as long. warranty is nice, but i can get 2 SR15 uppers for that, both of which will not die until the 40k round mark.

[@HKShootingwithDerekG]

@@dansmajd4105 'Yes, the mr556 is not a hard use gun, i'm aware of that" is an inaccurate statement