This is a complete short stroke GAS PISTON conversion kit for AR15 type carbines manufactured by Blackthorne Products. This system has a gas block that is machined from 4140 chrome moly steel (NOT cast). This gas block clamps onto a .750" diameter barrel at the standard carbine length and has a mil standard M1913 Picatinny rail machined into the top for easy attachment of accessories. The top of the rail is 1.200" above the centerline of the bore. The system features an ADJUSTABLE gas setting (I is for standard, II is for dirty gun, and III is cutoff) utilized by simply rotating the gas plug. The hard chrome plated gas piston is made from S7 tool steel for extreme toughness and long life. Also included is a bolt carrier with an integral gas piston lug. This lug is machined right into the carrier, it is all one piece of hardened 8620 steel. The carrier also incorporates an Anti-tilt design to ensure positive function. The handguards included with this system are M4 contour "Cool Tunnel" type. The top handguard and handguard cap are slotted to accept the piston system. This system is more reliable, cleaner, and runs cooler than other system. This system consists of: Gas block, adjustable gas plug, gas piston, gas piston spring, gas piston tube, one piece semi auto bolt carrier, bolt spring, M4 Cool Tunnel handguards and handguard cap. It comes assembled as shown with instructions. MADE IN USA!
This product was added to our catalog on Wednesday 07 July, 2010.