When looking at lightweight bolt carrier groups, they were unsatisfied with what the market had to offer. Seeing a capability gap, they set out to create a bolt carrier group that could live up to the GUNNER name with no compromise in strength or function. They set specifications that would allow no compromise:

1. Lightest Weight Possible (8.32 Ounces Complete, 6.24 Ounces Carrier & Key Only)
2. MIL-SPEC Materials & Finishes or Better!
3. Forward Assist Serrations
4. Compatible with Dust Covers
5. Maintains Full-Auto Trip Sear for full-auto and the new multi-stage trigger functionality
6. Looks Amazing

Matching their barrels, they've selected the QPQ method of Salt Bath Nitride for all the carriers components. By coating all parts, the carrier's natural slickness is increased markedly requiring less gas and pressure to operate. Further, the QPQ SBN process seals components against corrosion while making them fantastically wear resistant. 

As a testament of their trust, the carriers are all laser-engraved with the Faxon Shield after passing all Quality inspections.

Detailed Spec:

Bolt:

• 9310 Tool Steel Construction (Stronger than C158)
• Full MIL-SPEC Heat Treatment
• Shot Peened to MIL-SPEC
• Magnetic Particle Inspection (MPI)
• Back of Lugs Chamfered for Reliability
• Spring, Insert, & "Crane" O-Ring Installed
• QPQ - Salt Bath Nitrided

Extractor:

• S7 Tool Steel Construction
• Fully Heat Treated
• Shot Peened Per MIL-SPEC
• QPQ - Salt Bath Nitrided

Carrier & Key:

• Carrier: MIL-SPEC 8620 Steel Material
• Key: 4140 Steel Material
• Fully Heat Treated
• Forward Assist Serrations
• M16 (FULL-AUTO) Compatible
• Grade 8 Fasteners
• Fully & Properly Staked Key, Permatex Sealed
• QPQ - Salt Bath Nitrided
• Weight w/ Key (Not Bolt or any Pins): 6.32 Ounces

Cam Pin: 

• 4140 Pre-Hardended Steel Material
• QPQ - Salt Bath Nitrided