Aero Precision 5.56 Bolt Carrier Group Phosphate Coating
The Aero Precision 5.56 Bolt Carrier Group for AR-15 rifles is made from high quality materials with quality assurance measures like high pressure testing and magnetic particle inspecting. The bolt assembly is machined from Carpenter 158 tool steel and tested to ensure it can withstand thousands of high-pressure rounds. The Carrier assembly is machined from 8620 steel and the entire BCG is magnetic particle inspected to ensure every dimension is as precise at can be. The Manganese Phosphate coating on this AR-15 bolt carrier group will increase in lubricity as it absorbs oil and combines with the natural lubricity of carbon to ensure your rifle will run reliably. If you want to build a no frills, reliable duty rifle, you can’t go wrong with this Aero Precision BCG.
- Compatible with 5.56 NATO, .223, and .300 BLK
- M16 cut and full auto rated
- 8620 steel carrier
- Carpenter 158 tool steel bolt
- MPI and HPT
- Manganese Phosphate coating
- Properly staked gas key
- Chrome lined gas key and firing pin channel
- Shot peened bolt face
- Black O-ring extractor insert
Other areas that Aero Precision has focused on to improve the reliability of this M16 bolt carrier group is the chrome lined internals that come into contact with high pressure gases to prevent premature deterioration of critical components. The gas key has been staked, preventing it from coming loose over time and the bolt face has been shot peened to improve durability. Shot peening is the process of literally deforming the smooth surface in order to create more surface area and relieve stress to reduce the number of micro cracks from forming after many years of use.
Aero Precision takes some of the most state-of-the-art manufacturing techniques and equipment derived from their work in the aerospace industry and applies it to their products in the firearms industry. They have utilized their knowledge from years of building aircraft components to design and engineer AR-15 handguards, receiver sets, scope mounts, and more. They treat every product as if it were a precision flying machine and adhere to strict quality standards to ensure law enforcement, military, and civilian customers receive a product they can rely on.