Standard Super Gas Block – The bore of the SGB is machined to closely fit around .750” diameter mounting bosses found on most M4 Carbines and AR-15 rifles.
Installation Instructions can be found here.
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The 7.62×51 NATO (.308 Winchester) PMAG 20 LR/SR GEN M3 is a lightweight, cost effective, high reliability magazine for SR25/M110 pattern rifles featuring true 20-round capacity, constant-curve body, anti-tilt follower, and snap on Impact/Dust Cover. Designed specifically for SAAMI-spec ammunition, the PMAG 20 LR/SR is less than half the weight of standard issue steel magazines and maintains a service life round count approximately equal to the rifle barrel itself.
Standard Mil-Spec Charging Handle. Anodized Finish.
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″. Gas Port Diameter .120″. Available in 16″ with carbine length gas system
Mil-Spec Forward Assist Assembly
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