LANTAC Nib AR-10 308/7.62 Bolt Carrier Group Silver. Many users simply need a quality milspec component supplied at a sensible price. M-SPEC is a range of AR10 / AR308 accessories and components that follow the military specification in dimensions tolerances and materials with the addition of a few upgrades and enhancements to raise the performance standard of the product above the 'milspec' rating while retaining the same economical price point as traditionally offered by other providers. Offered in both 5.56/.223 and 7.62/.308 Caliber the Lantac M-SPEC 7.62/.308 BCG is precision machined to milspec dimensions and tolerances. The carrier is full auto style with increased mass and is manufactured from 8620 steel case hardened and hard turned/ground so that internal dimension are exact to mil specifications. It is then QPQ Nitrided rather than Type M Phosphated to give increased corrosion resistance durability and performance. The Bolt is machined from Carpenter 158 or 9310 shot peened and hard turned as per the military spec. Each BCG is further fitted with a Lantac CP-R360-H domed head cam pin which are precision machined from 17-4PH stainless steel hand polished and hardened to H900 condition this further reduces friction and wear within the upper receiver. The M-SPEC line of products are ideal for budget builds where quality and reliability are still paramount. BCG Suitable for DPMS patterened rifles. Specifications for LANTAC Nib AR-10 308/7.62 Bolt Carrier Group: Manufacturer: LANTAC Color: Silver Caliber: .308 Winchester Gun Make: AR Platform Gun Model: AR-10 Package Contents: LANTAC Nib AR-10 308/7.62 Bolt Carrier Group What firearm models does the manufacturer say LANTAC Nib AR-10 308/7.62 Bolt Carrier Group is compatible with? The manufacturer suggests that LANTAC Nib AR-10 308/7.62 Bolt Carrier Group is compatible with AR-10LANTAC 01-MSPEC-762-NIB-BCG: Nib AR-10 308/7.62 Bolt Carrier Group Silver