J&E Machine Tech PS-BCG3 AR-15 Bolt Carrier Group .223/5.56/300 Blackout/350 Legend Nitride

The J&E Machine Tech PS-BCG3 is a mil-spec bolt carrier group for the AR-15 platform, rated for a full range of popular cartridges so one carrier covers multiple calibers. It is designed to cycle .223 Rem, 5.56 NATO, .300 Blackout, and 350 Legend uppers, allowing shooters to maintain a single proven BCG across different builds instead of stocking a dedicated carrier for each chambering.

Finished in mil-spec Nitride for corrosion resistance, wear protection, and easier cleaning, the PS-BCG3 is machined to standard AR-15 bolt carrier group dimensions for drop-in fit on semi-automatic upper receivers. It is suitable for .223/5.56 carbines and pistols, .300 Blackout SBR and pistol builds, and 350 Legend hunting rigs.

Whether you are completing a dedicated .223/5.56 carbine, assembling a versatile .300 Blackout upper, or running a 350 Legend hunting AR, the J&E Machine Tech PS-BCG3 delivers true multi-caliber functionality in a mil-spec Nitride package.