Mil-Spec 6 position Receiver Extension Tube, Castle Nut, End Plate
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Features: 4150 Certified Gun Barrel Quality Steel, Barrel Type: Button Rifled, Caliber: 300BLK, Twist: 1:8, Inside Finish: QPQ Nitride, Outside Finish: QPQ Nitride, Muzzle Thread: 5/8-24 TPI, Gas Block Diameter: .750″. Available in 10.5″ with pistol length gas system and 16″ with carbine length gas system.
AR-10 Carbine Buffer and Spring.
Mil-Spec Forward Assist Assembly
The Super Modular Rail (SMR) MK4 M-LOK™ is Geissele’s ultra-lightweight M-LOK option. These rails are purpose-built and feature integrated M1913 picatinny rail sections at the fore of the rail in the 3, 6 and 9 o’clock positions. Maximum venting for heat dissipation also dramatically reduces the rail's overall weight, while maintaining its same strong and rigid platform.
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