The Fostech Complete BCG (Bolt Carrier Group) in Black is a high-performance component designed for AR-15 platform rifles. This fully assembled bolt carrier group is engineered to deliver reliable operation and enhanced durability in various shooting conditions. The black finish provides excellent corrosion resistance and reduces friction for smooth cycling. Precision-machined from high-quality materials, this BCG ensures consistent headspace and proper lock-up for improved accuracy. Compatible with standard AR-15 upper receivers, it's an ideal upgrade or replacement part for your rifle, offering enhanced reliability and performance.

This is a standard full-auto M16 cut bolt carrier group. It is designed to function with the Echo AR-II and the Echo Sport.

Bolt Assembly

• Bolt: Shot Peened; Magnetic Particle Inspected and Marked
• Bolt Material: 9310 Alloy Steel
• Compatibility: .223 / 556 / 300BLK
• Extractor: Shot Peened Hardened Tool Steel
• Extractor O-Ring: Viton Mil-Spec
• Gas Rings (3): Mil-Spec
• Finish: BLACK NITRIDE

Bolt Carrier

• Material: 8620 Steel
• Design: Heavy Profile M16 Style
• (Preferred for most AR-15 Builds)
• Gas Key Screws: Grade 8; Properly Torqued and Staked to Mil-Spec
• Gas Key Material: 4130 Steel
• Finish: BLACK NITRIDE

Cam Pin

• Material: 4140 Steel
• Finish: BLACK NITRIDE

Firing Pin

• Material: 8740 Steel; Centerless Ground; Hard Chrome Plated
• Weight: 11.6 Ounces

100% USA Made