The A.R.M.S. #51 C A1A2 S.I.R. System is the civilian version slimline for 5.56 caliber A1A2 carry handle carbines. It fits both A1 and A2 carry handle uppers with carbine length gas systems and locks into both he carry handle channel and the handle front support via dual self locking thumbnuts for a rigid, secure fit. A forward rail section allows the user the option of forward mounting optics and the ability to co-witness with irons. This system is easy to install and features a rugged, lightweight design of 17.4 oz.
SPECS:
Specs: Designed for 5056 caliber A1 and A2 carry handle carbines, Weight: 17.4 oz, Easy installation, Self locking thumbnuts, Forward rail section, Black finish