2018年1月7日 · United States Army Special Operations Command (USASOC) Upper Receiver Group, Improved (URG-I) and Naval Special Warfare (NSW) Upper Receiver Group, Improved …

2021年6月12日 · I know not everyone is a clone guy. But of the two which did you guys end up liking more? And why?

2020年5月18日 · Hey all! I have a brand new DD M4A1 RIS II rail and my Colt upper ready to go, but I can't decide if I want to build it up or try to get a Geissele Mk16 rail instead. I know …

2024年9月20日 · 14.5” Geissele URGI upper with DD barrel Considering option for optics as this will be my main go to rifle. I am am experienced Aimpoint user - I like the battery life, the …

2022年1月5日 · [ARCHIVED THREAD] - Maybe a dumb question, but what does "Block 1", "Block 2", "Block 3", etc mean?As used for designations? eg, M4

2022年11月3日 · [ARCHIVED THREAD] - Thoughts on the DD M4 RIS III Rifle and General Question About Hard-Use Rifle Choices? (Page 1 of 2)

2021年7月4日 · Just saw your post. I posted this in the M4 Block 1-1.5 thread on 7/2. Stripped Upper Receiver Score! DSA Receiver M Forge Code, M4 Dog Bone marked at gas tube. I …

2024年10月10日 · Firearm Discussion and Resources from AR-15, AK-47, Handguns and more! Buy, Sell, and Trade your Firearms and Gear.

2021年8月5日 · Been trying to find more details and pics out there for a Marine Recon M4 build (the one with the ergo extensions), just doesn't seem to be a lot out there on them. Anyone …

2021年3月13日 · Here’s a military issued rifle with a URGI upper that was built using a cage code upper from colt.