KAC-Knight's Armament SR-25/M110 Double High Picatinny Gas Block, 0.750" (25190)
 
Knight's Armament SR25 M110 double picatinny gas block.  This is the same gas block used on the current M-110 SASS guns.  Gas block requires professional installation as it is not drilled for the top roll pin or bottom taper pins.  Please contact us for installation. 
 
Sold separately:
Gas Block suppressor locating pin, part # 20380, 
Taper pins, part # 21039 (2 required), 
Roll pin, part # 20173,