- Product Code: 51087
Axem Bolt Carrier Group is an AR-15 BCG assembly for 5.56 caliber systems, combining a lightweight LW design and SBN (salt bath nitride) finish for reliable operation and easy maintenance.
The BCG includes the carrier, bolt, cam pin, firing pin, firing pin retaining pin, and extractor assembly, making it ready to install in a standard AR-15 upper receiver. The 5.56 NATO/.223 Rem compatibility ensures wide compatibility with common barrels and uppers. The alloy steel, hardened construction is designed for demanding use, providing consistent locking and smooth movement.
The salt bath nitride treatment (SBN, QPQ) forms a dense surface layer that provides low friction, excellent wear resistance, and weather resistance. The lightweight (LW) carrier reduces the effect of moving mass on bolt movement, helping to control recoil impulse and supporting fine-tuning of operation with gas and buffer adjustments. The smooth surface makes carbon fouling easier to remove and reduces the need for lubrication.
The design adheres to AR-15 standards: the gas key is sized for direct impingement systems, the bolt locks into the locking lugs of most 5.56 chambered barrels, and the assembly works with mil-spec dimensioned uppers and buffer systems. It is recommended to check headspace when installing a new bolt and barrel combination. The BCG is intended to be maintained with standard tools; the SBN surface eases cleaning and protects against corrosion.
Axem Bolt Carrier Group – Features:
- Platform: AR-15 (direct impingement)
- Type: BCG (bolt carrier group), complete assembly
- Caliber compatibility: 5.56 NATO / .223 Rem (AR-15 locking)
- Finish: SBN (salt bath nitride, QPQ) black
- Construction: LW (lightweight) reduced-mass carrier geometry
- Materials: hardened alloy steel (bolt and carrier), wear-resistant small parts
- Contents: carrier, bolt, cam pin, firing pin, firing pin retaining pin, extractor (spring and insert)
- Compatibility: mil-spec AR-15 upper, 5.56/.223 chambered barrels
- Surface properties: low friction, excellent wear resistance, corrosion protection
- Maintenance: SBN surface eases cleaning and reduces the need for aggressive brushing
- Color: black (nitride)
Summary: the lightweight LW design, SBN finish, and AR-15 compatible dimensions make this BCG a reliable and maintenance-friendly choice for builds and upgrades. It provides smooth operation and supports tuning with gas, spring, and buffer adjustments for various loads.
Recommended use: suitable for 5.56/.223 AR-15 setups when seeking reduced moving mass, durable SBN surface, and reliable operation for versatile shooting and hunting rifle configurations.
Product text updated on 6.3.2026.
