The DPMS AR-10 Nitride Bolt Carrier Group, built to DPMS’s OEM spec in .308 Winchester (DPMS part no. DP51655141280), is a complete drop-in BCG ready to install. DPMS Panther Arms machines the bolt from 9310 steel, a stronger alloy than the more common 8620 steel used for many budget bolts, and pairs it with extra-strength extractor springs for more consistent extraction under heavy use. The entire bolt assembly is nitride treated for increased wear resistance and corrosion protection compared to a standard phosphate finish. The 8620 steel carrier is nitride treated as well, and its gas key is properly staked with grade 8 fasteners to keep it from loosening under recoil.

Key Specifications

• Bolt machined from 9310 steel, a stronger alloy than standard 8620 bolt steel.
• Nitride-treated bolt assembly resists wear and corrosion better than a standard phosphate finish.
• Extra-strength extractor springs improve extraction reliability under heavy use.
• Carrier machined from 8620 steel and nitride treated to match the bolt’s finish and durability.
• Gas key is properly staked with grade 8 fasteners to prevent loosening under recoil.
• Built to DPMS’s OEM AR-10 platform specifications for a true drop-in fit.
• Chambered for .308 Winchester.

Frequently Asked Questions

What platform does this BCG fit? DPMS’s AR-10 platform, chambered in .308 Winchester.

What’s the benefit of a 9310 steel bolt over 8620? 9310 steel is a stronger alloy, giving the bolt better durability under the higher pressures of repeated cycling.

Is the carrier finished the same way as the bolt? Yes — both the bolt assembly and the 8620 steel carrier are nitride treated for wear and corrosion resistance.

Buy the DPMS AR-10 Nitride Bolt Carrier Group, .308

Drop a stronger, better-finished BCG into your AR-10 build with this DPMS nitride bolt carrier group. Browse more rifle parts or order this BCG from our Lubbock, Texas gun shop for fast, insured direct shipping.