Guntec USA AR-15 Low Mass Skeletonized Bolt Carrier Group

Guntec USA Complete Nitride Skeletonized Low Mass BCG is nitride Coated Inside and Out (Bolt, Carrier, and Gas Key) then assembled by experienced personnel. The Guntec complete bolt carrier groups for The AR-15 are made from high quality steel .  The bolt carrier is made from 8620 steel and the bolt from 9310 steel. The gas key on the AR-15 Skeletonized Low Mass BCG has been properly staked, the extractor spring has an upgraded O-ring for more tension, and all surfaces are nitride coated. The Bolt has been magnetic particle inspected for proper strength and machining.

Skeletonized Low Mass Carrier

8620 Tool Steel

Full Auto M-16

Mil Spec Bolt

9310 Steel
Magnetic Particle Inspected (MPI)

Mil Spec Extractor

8620 Tool Steel
Nitride Finish
Extractor Spring

Mil Spec Gas Key

8620 Tool Steel
Grade 8 Hardware
Properly Staked

Weight: 8.8 oz