JE Machine PS-BCG3 223/556/300BO/350 M16 AR Bolt Carrier Group - SKU: PS-BCG3 - UPC: 811577030921
Product Description
The JE Machine Tech PS-BCG3 is a full-auto M16 profile complete Bolt Carrier Group (BCG) engineered for reliable cycling in AR-15 platforms chambered in 5.56x45mm NATO, .223 Remington, .300 AAC Blackout, and .350 Legend. Built to mil-spec tolerances, the PS-BCG3 provides smooth bolt cycling, consistent lockup, and positive gas seals across varied ammunition pressures and shooting schedules.
The bolt carrier is machined from high-strength 8620 tool steel, while the bolt assembly is precision-turned from 9310 alloy steel, shot-peened, and Magnetic Particle Inspected (MPI) to identify microscopic surface fractures before deployment. The carrier key is properly torqued and staked to the gas key body using heavy-duty Grade 8 fasteners to prevent gas leaks and mechanical backing out under high thermal cycles.
Finished with a protective manganese phosphate coating, the PS-BCG3 holds oil and synthetic lubricants efficiently, resisting corrosion, carbon buildup, and harsh field environments on tactical, defensive, and recreational AR builds.
*Armorer Bench Notes & Real-World Staging Guidance:
Fitment Matrix: Fits standard mil-spec AR-15 / M16 upper receivers chambered in 5.56 NATO, .223 Rem, .300 AAC Blackout, and .350 Legend.
- Verify host firearm is completely clear, magazine removed, and chamber visually and physically confirmed empty.
- Clean internal upper receiver track and apply a generous coat of synthetic firearm lubricant to the four contact rails of the PS-BCG3 carrier body.
- Pull the bolt head forward into its fully unlocked position in the carrier before installation.
- Insert the BCG assembly into the rear of the upper receiver, ensuring the gas key aligns with the gas tube.
- Install charging handle and BCG, close upper to lower receiver, and perform dry-fire function checks to ensure smooth lockup and reset.
Key Features
- Full-Auto M16 Profile: Increased mass aids in smooth cycling, lockup timing, and felt recoil reduction.
- 9310 Steel MPI Bolt: Magnetic Particle Inspected bolt head ensures maximum tensile strength and resistance to lugs shearing.
- 8620 Steel Carrier Body: Precision-milled carrier body handles severe rapid-fire recoil schedules and thermal cycles.
- Properly Staked Gas Key: Grade 8 fasteners are staked to ensure gas seal integrity and prevent gas leakages.
- Multi-Caliber Compatibility: Runs reliably in 5.56 NATO, .223 Rem, .300 Blackout, and .350 Legend barrel setups.
- Manganese Phosphate Finish: Retains lubrication, resists carbon adhesion, and protects against rust and wear.
Product Specifications
- Brand: JE Machine Tech
- MPN: PS-BCG3
- UPC: 811577030921
- Caliber Compatibility: 5.56 NATO / .223 Rem / .300 AAC Blackout / .350 Legend
- Profile: Full-Auto M16
- Bolt Material: 9310 Steel (MPI Tested)
- Carrier Material: 8620 Tool Steel
- Gas Key Fasteners: Grade 8 (Staked)
- Finish: Black Manganese Phosphate
