The Strike Industries SIAR is a monolithic modular short-stroke piston gas system AR-15 upper receiver assembly. The SIAR uses any AR-15 compatible barrel with 0.75-inch gas block journal that has a mid-length gas system and the barrel is easily swapped out by loosening two (2) hex screws. Keeping the theme of trying to use as many common Mil-Spec AR-15 parts as possible, the SIAR BCG can use any AR bolt head to easily change calibers. A 4-position regulated gas block propels a single gas piston. Since the operating system is contained within the upper, you can use any lower receiver with or without a receiver extension giving you any option to pair the SIAR upper assembly with. The side charging handle is swappable, non-reciprocating and placed forward out of the way. Handguard has five (5) M-LOK slots on either side and six (6) on the bottom. Various colors. SIAR will need a barrel, BCG, firing, muzzle device and AR lower receiver to complete.
*subject to change on production model.