Cru Arms Temp556 Rifle- Black. Semi automatic 5.56NATO rifle with a 16" threaded barrel and MP5 style non reciprocating charging handle. The Temp 556 rifle has a billet aluminum receivers and is compatible with AR15 grips, stocks and trigger packs. The upper receiver has a full length monolithic 1913 Milspec rail perfect for your favorite optic or tactical accessory. The Temp 556 is also equipped with a bolt catch and release lever, which are located on the left side of the rifle. Other features include an ACR style folding stock and a 30 round magazine.