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Operating System: PWS Long Stroke Piston System

Muzzle Device: A2 Flash Hider

Caliber: .300BLK

Barrel Length: 9.75”

Barrel: 416 Stainless Steel, Button Rifled

Twist: 1:8

Handguard: PWS free float Mlok™11” Handguard (1.6” width, 2.1” height)

Upper Receiver: PWS Proprietary Piston Upper, 6061 extrusion, Anodized 

Charging Handle: Radian Raptor™Ambidextrous Charging Handle 

Overall Length:   18.5”

Height:  2.3”

Width:   2.5”

Weight: 3 lbs. 10 oz.

The MK1 PRO upper will not work with a lower that has extended bolt catch/bolt releases that extends over the upper receiver- like the Phase 5 or B.A.D. style.

We are looking to make a change to the tech data package in the future to accommodate this, but at this time it has not been modified.