Fostech Complete Bolt Carrier Group Black

Fostech Complete Bolt Carrier Group

This is a purpose-built bolt carrier group designed for shooters who demand reliability and precision. The full-auto M16 cut design provides compatibility with a wide range of AR-platform rifles, including the Fostech Echo AR-II and Echo Sport systems.

Bolt Assembly

Superior Materials and Finishing

• Bolt machined from 9310 alloy steel for exceptional durability
• Shot peened and magnetic particle inspected for quality assurance
• Hardened tool steel extractor with Viton mil-spec O-ring
• Three mil-spec gas rings for reliable cycling
• Black nitride finish resists corrosion and wear

Bolt Carrier

Heavy Profile Design

• 8620 steel construction preferred for most AR-15 builds
• Heavy profile M16 style carrier for enhanced reliability
• Grade 8 gas key screws properly torqued and staked to mil-spec standards
• 4130 steel gas key with black nitride finish

Additional Components

• Cam Pin: 4140 steel with black nitride finish
• Firing Pin: 8740 steel, centerless ground and hard chrome plated for longevity
• Weight: 11.6 ounces
• Caliber Compatibility: .223 Remington, 5.56 NATO, and 300 Blackout

Made in America

100% USA manufactured to exacting standards. This bolt carrier group represents the quality and attention to detail that serious shooters expect.