Rainier Arms MOD 3 UltraMatch Billet AR15 Stripped Upper Receiver AR-15
Our billet uppers are CNC machined from solid billet 7075-T6 aluminum which is 70% stronger than the commonly used 6061 aluminum and finished with milspec hardcoat anodize to a surface hardness of 60 Rockwell. The precision machining on our our billets are well known in the industry and we are excited to introduce our uppers for your next rifle build.
- A4 Feed Ramps
- 7075 Billet Aluminum
- Mil Spec Hardcoat Anodize
***** 5 STAR Excellent fit for my Mega billet lower
Fits really well with my Mega lower. I got the "S" billet lower from Mega which has the circular buffer ring as opposed to the "H" hex designation. This mates up perfectly with the standard billet lower from Mega. Looking forward to more good stuff from Rainier