Superlative Arms SABC-15-DI-RFT Bolt Carrier Group

Available in Tan or Dark Diamond-Like Coating (DLC)
Inspected and Approved by Ally Munitions

Built for Harsh Use – Vetted by Us

Every Superlative Arms BCG sold by Ally Munitions undergoes our full internal QC process, including staking inspection, hardware fit, bolt installation, and surface integrity. We’ve installed a headspaced 6mm ARC bolt (Type 2) on each unit, making it ready for common cartridges like 6mm ARC, 22 ARC, 338 ARC, and 6.5 Grendel. These bolt carriers have been tested extensively across a wide range of builds in our shop.

Choose your finish:

• Tan Diamond-Like Coating (DLC)

• Dark Diamond-Like Coating (DLC)
  Note: Color/tone may vary slightly from lot to lot.

Technical Specifications

Carrier Specs:

• Material: 8620 Steel

• Type: Full-Mass, Full-Auto Rated

• Bore: Chrome-Lined (Mil-Spec)

• Finish: Tan or Dark DLC (Diamond-Like Coating)

• Gas Key Material: 4130 Steel

• Gas Key Finish: Dark DLC

• Gas Key Screws: Optimized Carrier Key Screws (OCKS) by Ned Christiansen

• Weight: 11.3 oz (Full Assembly)

Bolt Specs (Installed):

• Material: Carpenter 158 Steel

• Finish: Diamond-Like Coating (DLC)

• Extractor: 4140 Steel

• Cam Pin: 4140 Steel, DLC Finish

• Firing Pin: 8740 Steel, Hard Chrome

• Gas Rings: Mil-Spec x3 + O-Ring

• Treatment: Shot Peened, MPI Tested

• Bolt Face: Type 2

• Cartridge Compatibility: 6mm ARC, 22 ARC, 338 ARC, 6.5 Grendel

What Sets This Carrier Apart

• Diamond-Like Coating (DLC):
  Increases wear resistance, lowers friction, and helps mitigate fouling and corrosion—especially in suppressed or high-heat environments.

• Slotted & Angled Carrier Rails (Relief Cuts):
  These strategically placed cuts displace grit, carbon, and fouling from critical contact zones, dramatically improving cycling under adverse conditions.

• Chrome-Lined Carrier Bore:
  Mil-spec treatment enhances thermal and mechanical durability over long shooting sessions.

• OCKS Gas Key Screws:
  Torque-hardened and hydraulically staked to prevent screw walkout under pressure. A performance detail that matters.

• Full Ally Munitions QC Check:
  All BCGs now go through our full inspection process before being added to inventory. This includes staking, bolt alignment, tension, and visual surface check. A detailed video outlining our BCG inspection standard is coming soon.

Ally Munitions Notes

We currently have several of these running in test uppers and rifles, and every single one is still in use with zero reliability concerns. These bolt carriers continue to impress, especially in suppressed applications or harsh field conditions. If you're looking for a dependable ARC-compatible BCG that can handle abuse, this is a top-tier option.

Legal & Fitment Notes

• Compatible with all standard AR-15 uppers using Type 2 bolt face cartridges

• Buyer assumes all responsibility for safe installation and legal compliance

• No refunds or returns once installed or fired