This bolt carrier group for AR-15 style rifles meets or exceeds mil-spec. It has a black nitride finish which not only resists corrosion but reduces the need for lubricants. The carrier is case hardened 8620 steel. The bolt is true mil-spec dimensions and made of case hardened 9310 steel. It has been magnetic particle tested and undergone a high pressure test The 4130 steel gas key is properly staked.

Specifications and Features
Odin Works AAC-6.5-BCG
Meets or exceeds mil-spec
6.5 Grendel
Case hardened 8620 steel carrier
Case hardened 9310 bolt
MPI and HPT tested
4340 steel extractor, manganese phosphate coated
Hardened 4340 cam pin
4130 steel gas key, properly staked
Black nitride