The Super Duty MOD1 Geissele CHF barrel and Forged Stressproof Bolt are High-Pressure Tested (HPT) and Magnetic Particle Inspected (MPI) and work in concert to achieve unmatched dependability with match-grade accuracy. The Forged Stressproof Bolt is made from Carpenter 158+ directly developed with Carpenter Steel metallurgists to create a material that is cleaner and has less impurities. This makes the Stressproof Bolt stronger capable of 5 times the life of a mil-spec bolt; balanced gas system including the bomb-proofed Super Compact Gas Block fine-tuned gas port sizing and Super 42 braided buffer spring; HUX WRX Flash Hider-QD muzzle device; SSA-E X two-stage trigger; ambidextrous Super Configurable Safety; Airborne Charging Handle checkered magazine release and Maritime Bolt Catch provide superior interfacing with the platform; center-tab mated MK16 rail; SB Tactical SBA3 brace; A17 grip; Geissele Quick Disconnect (QD) Sling Mount Endplate and stainless steel QD inserts on the MK16 rail. *Note- this firearm does NOT ship with a magazine.