The AIM Surplus Black Nitride BCG is definitely one of the nicest BCG’s I own. I’ve been using one for I think about 4 months now with absolutely zero issues. It features an 8620 enhanced carrier, a Billet Machined 4140 Gas Key and the entire BCG is coated inside and out in Black Nitride. Black Nitride is very slick and easy to clean but is much more durable than most other BCG coatings. I have the original version of this BCG which had a 9310 Bolt. This new v2 BCG has been upgraded with a C158 bolt which is something I know a lot of people are pretty picky about. AIM Surplus just received a new shipment of these at an unbeatable deal. While they are still in-stock they are just $99.95 with FREE SHIPPING in the lower 48 States. Purchase one (or five 🙂 ) at www.AIMSurplus.com.
We are proud to announce the release of our v2 Back Nitride AR/M16 .223/5.56 Bolt Carrier Groups. MPI (Magnetic Particle Inspected) Bolt.
–– 8620 Tool Steel Enhanced Radius design (Angle Cut) Carrier with inside and out Black Nitride Treatment
– CARPENTER 158 MPI Bolt with inside and out Black Nitride Treatment
– Billet Machined Extractor with Black Insert and O-Ring upgrade
– Billet Machined 4140 Steel Gas Key
– Grade 8 Fasteners
– Military Specification Gas Key Staking