San Tan Tactical Enhanced AR-15 Bolt Carrier Group - 5.56 - Nitride

Manufactured by San Tan Tactical
SKU: STT-Enhanced-BCG-556
MPN: STT-Enhanced-BCG-556
Manufactured by San Tan Tactical
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The San Tan Tactical Enhanced Bolt Carrier Group is exactly what it says it is. Not content to simply take a MIL-SPEC part off the shell and slap the label 'Enhanced' on the box, STT has reengineered the carrier to maximize performance for shooters who push their rifles. The carrier is machined with a flared tail that better aligns the BCG in the receiver extension as it cycles and basically eliminates carrier tilt. Mass has been increased as well, keeping the bolt locked just a little longer to aid in reliability and extraction while shooting suppressed or short barreled rifles. Lastly, the optimized bearing surfaces reduce the points of contact in your receiver meaning less friction and wear! The 5.56/.223 bolt assembly is MIL-SPEC in dimension to ensure compatibility with any barrel, but also features improvements in both manufacturing technique and finishing. Both bolt assembly and bolt carrier have been finished with a slick, easy to clean, and incredibly durable salt bath nitride process.

  • Case Hardened 8620 steel carrier
  • Flared carrier tail prevents tilt
  • Reduced points of contact for less friction
  • Optimized bearing surfaces
  • Increased mass for improved dwell time
  • Case Hardened 9310 bolt assembly
  • Shot peened surface
  • Magnetic Particle inspected
  • High pressure tested
  • MIL-SPEC Extractor spring and O-Ring
  • Slick and durable salt bath ntiride finish

San Tan Tactical believes in carrying on the tradition of American designed and made firearms and that is exactly what they are doing. Their receivers and lower parts are some of the most innovative in the industry and they are proud bring you a product not only made from American sourced materials, but American machinery as well. They take the time to listen to customers critiques and are constantly evolving their products to satisfy your needs.
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Bolt FinishSalt Bath Nitride
Bolt Material9310 Steel
BrandSan Tan Tactical
Caliber Gauge5.56 NATO
Carrier FinishSalt Bath Nitride
Carrier Material8620 Carpenter Steel
Carrier StyleCustom Bolt Carrier
California Prop 65 warning

 WARNING: This product can expose you to chemicals, which are known to the State of California to cause Cancer and Reproductive Harm. For more information go to

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