Rainier Arms Ruc Pro Mk1 5.56 Nato Partial Upper Receiver Black 12.5 in RA-MK1-12.5-PU-BLK
$600.00
Rainier Arms Ruc Pro Mk1 5.56 Nato Partial Upper Receiver Black 12.5 in RA-MK1-12.5-PU-BLK. Bringing the highest quality parts to the market while offering the best value as well. This partial upper utilizes a Rainier Arms Low Pro nonadjustable gas...