Aero Precision APRH308184 .308 Bolt Carrier Group

Aero Precision M5 .308 Bolt Carrier Group

This is a complete, ready-to-install bolt carrier group designed for serious .308 rifle builders. It's the firing mechanism that transforms your upper receiver into a functioning rifle.

Carrier Specifications

Material & Finish:

• Machined from 8620 tool steel
• Mil-spec phosphate coating for corrosion resistance
• Forward assist serrations for positive engagement

Gas Key:

• 4130 steel construction
• Attached with Grade 8 hardware
• Properly staked for reliability
• Chrome-lined gas key and firing pin channel

Bolt Specifications

Material & Heat Treatment:

• Case-hardened 9310 steel
• Shot peened for durability
• Phosphate coated
• CNC ground external surfaces after heat treat for precision fit

Extractor System:

• Machined from 4340 steel
• Double o-rings and double springs for consistent extraction
• Engineered for reliability across multiple cartridges

Firing Pin:

• Machined from 8740 steel
• Hard chrome coated for extended service life
• Reduced diameter (.070") firing pin hole for precision ignition

Quality Assurance:

• Magnetic Particle Inspected (MPI)
• High Pressure Tested (HPT)
• High-pressure rated for demanding applications

Multi-Caliber Compatibility

This bolt is engineered to function reliably with .308 Winchester, 7.62×51mm NATO, .338 Federal, and other .308-based cartridges—giving you flexibility for future builds.

What's Included

• Complete bolt carrier
• Bolt assembly
• Firing pin
• Cam pin
• Retaining pin
• Laser-engraved Aero Precision logo

This is a no-compromise component for builders who demand precision and reliability.