Armory Sponsor
Posted: 7/22/2026 2:30:13 PM EDT
|
Just showed up about 10 minutes ago. This is my first hk rifle/upper but the quality of it is absolutely fantastic. ImNext up is an exps3 and g33 magnifier. Function checked with 5 30 round mags. Runs great, maybe it’s a piston thing but for a 5.56 the recoil was stout, not bad just stout. I feel like running m855 I could go to a different gas screw and be perfectly fine. I’ll order a few different ones today. With the arc fire it absolutely runs like a sewing machine. What a great rifle.     |
|
Awesome man. I got my upper a couple weeks ago and couldn't be happier with it. Accuracy, build quality and the ability to mess with the vent screws is the main ones for the moment. I just got done testing mine with a 2.3mm screw and PMC bronze on suppressed setting, it all functioned fine. I'm using an A5 extension with the A5-H2 at the moment. Got a 2.4 and 2.5mm vent screw on the way for more testing. You can see some of my groups at the end of this thread. https://www.ar15.com/forums/ar-15/HK-MR556-A4-Upper-w-VLTOR-A5-Buffer/126-791560/&page=1&anc=8799286#i8799286 I couldn't shoot a bad group that day with the upper. Super happy with my purchase. |
|
Originally Posted By Nobody69s: Awesome man. I got my upper a couple weeks ago and couldn't be happier with it. Accuracy, build quality and the ability to mess with the vent screws is the main ones for the moment. I just got done testing mine with a 2.3mm screw and PMC bronze on suppressed setting, it all functioned fine. I'm using an A5 extension with the A5-H2 at the moment. Got a 2.4 and 2.5mm vent screw on the way for more testing. You can see some of my groups at the end of this thread. https://www.ar15.com/forums/ar-15/HK-MR556-A4-Upper-w-VLTOR-A5-Buffer/126-791560/&page=1&anc=8799286#i8799286 I couldn't shoot a bad group that day with the upper. Super happy with my purchase. What suppressor are you using? |
|
Originally Posted By Nobody69s: I've heard nothing but good about either of those. Waiting for my buddy to buy one so I can try it before I buy it kind of thing. Internet videos only achieve so much when it comes to suppressors IMO. Very true. I have a nomad L I think I’m gonna run for now. It’s huge and heavy but it’s better than nothing. It was great in my 300 blackout. I need an optic and about 15,000 rounds with this arc fire trigger lol. |
|
Originally Posted By awd_xtc: Very true. I have a nomad L I think I'm gonna run for now. It's huge and heavy but it's better than nothing. It was great in my 300 blackout. I need an optic and about 15,000 rounds with this arc fire trigger lol. Do they have a shorter version of the Nomad? It's easy to burn through some rounds with an FRT. The most back to back rounds I've fired was 180 and it started getting pretty red hot with the B&T print-xh RBS SC! (word salad name) 
|
|
Originally Posted By Nobody69s: I'm looking at getting a suppressor for my newly SBRed 300 blackout. Do they have a shorter version of the Nomad? It's easy to burn through some rounds with an FRT. The most back to back rounds I've fired was 180 and it started getting pretty red hot with the B&T print-xh RBS SC! (word salad name) Yes it’s just called the nomad 30 |
|
Originally Posted By awd_xtc: Just showed up about 10 minutes ago. This is my first hk rifle/upper but the quality of it is absolutely fantastic. ImNext up is an exps3 and g33 magnifier. Function checked with 5 30 round mags. Runs great, maybe it’s a piston thing but for a 5.56 the recoil was stout, not bad just stout. I feel like running m855 I could go to a different gas screw and be perfectly fine. I’ll order a few different ones today. With the arc fire it absolutely runs like a sewing machine. What a great rifle. https://i.postimg.cc/FFyMXZvV/IMG-2687.jpg https://i.postimg.cc/sx4qPVKF/IMG-2688.jpg https://i.postimg.cc/dV1pdcyX/IMG-2697.png https://i.postimg.cc/DwZHs3XB/IMG-2698.png Cool rifle. BTW, a function check is not shooting the rifle. |
|
Oh so sorry. Making sure that the trigger would work with the hk bolt…not sure how to check that function without actually firing it. |
|
Originally Posted By Walker77: I'm wishing now that I would have got the 11" instead of the 16". https://i.postimg.cc/h477dZfh/20260715-193613.jpg Great looking rifle. I want the mr762 assulter next. |
|
Originally Posted By awd_xtc: Some railscales to help manage the heat. https://i.postimg.cc/bvFdK8DJ/IMG-2844.png https://i.postimg.cc/Ls0hrRY6/IMG-2845.jpg They aren't as pokey as they used to make them! |
|
Originally Posted By willi3d: Get both. The MR762 is actually an A4 upper on an A1 lower, but the MR556 is a full A4. https://imagizer.imageshack.com/v2/xq70/922/KivPzz.jpg https://imagizer.imageshack.com/v2/xq70/922/HSOFoU.jpg Easy solution! Buy an 11" upper and SBR your lower 
|
Armory Sponsor
Join the Community
Your next conversation starts here.
Create your free account to join discussions, share your experience, save topics, and connect with the AR15.COM community.
- Join discussions
- Follow topics and replies
- Connect with fellow enthusiasts
Already a member? Sign in
Stay informed by subscribing to our Newsletter