PLATFORM FM-9HCALIBER 9mmOP. SYSTEM STRAIGHT BLOWBACKBARREL LENGTH 16"BARREL CONTOUR LIGHTWEIGHTBARREL MATERIAL 41v50BARREL FINISH BLACK NITRIDEBARREL TWIST 1:10MUZZLE DEVICE MICRO BLAST DIFFUSERMUZZLE THREAD 1/2 x 36TRIGGER TYPE USGI MIL-SPECWEIGHT 5.8 lbs.LENGTH 31.5"HAND GUARD 15" MLOK FREE FLOATCHARGING HANDLE MIL-SPEC REAR CHARGESAFETY SELECTOR FM PRODUCTS AMBI.RECEIVER MATERIAL BILLET AIRCRAFT ALUMINUMRECEIVER FINISH TYPE III HARD BLACK ANNO.RECEIVER EXTENSION MIL-SPECSTOCK / BRACE MIL-SPEC M4 STOCKPISTOL GRIP HYBRID RESERVE MAG.TRIGGER GUARD INTEGRATED