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Balanced Bolt Carrier Group Complete
Balanced Bolt Carrier Group Complete
Sharps Rifle Company Balanced Bolt Carrier Group with Relia-Bolt

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Discontinued - See Replacement: XPB Carrier Group Bolt Carrier Complete
Your Price: $199.99

Stock Status:Out of Stock

Availability: Discontinued. See Replacement XPB Carrier Group


The Sharps BBC is precisely machined from S7 steel which then undergoes our proprietary heat treatment process. Finally the BBC is finished inside and out with NP3®/NP3® PLUS to minimize the need for lubricants, to aid in smooth operation and to make clean up a breeze. The BBC has the SRC logo machine cut on the side of the carrier which is visible when the ejection port door is open. It fits standard AR-15/M16/M4 rifles chambered in .223/5.56mm, 25-45 Sharps and 300 Blackout calibers.

30-Day Money Back Guarantee
Interested in our products, but hesitant on the design? We offer a 30-Day Money Back Guarantee for certain SRC products including, the Relia-Bolt, Bolt Carrier, and Bolt Carrier Group.

Superior Corrosion Resistance
Every Balanced Bolt Carrier Group is coated with NP3®/NP3® PLUS, an electroless nickel-based finish. This process co-deposits sub-micron particles of PTFE (polytetrafluoroethylene), commonly known as Teflon™, for self-lubricating corrosion resistance. NP3® PLUS offers far more corrosion resistance for marine and other hostile environments. NP3® PLUS gain up to five times as much corrosion resistance over standard NP3® and up to 10X more than regular electroless nickel!

Commonly asked questions:

Question: When developing the BBC why didn’t you address the designs of the gas key and the firing pin retaining pin?

Answer: We experimented with attaching a new gas key in a unique way as well as a radically different firing pin retention system but at the urging of our Professional users we chose to stay with standard Mil Spec components to simplify battlefield repairs and to simplify maintenance by the civilian MSR enthusiast.

Question: Does the Sharps BBC weigh less or more than a standard Mil Spec bolt carrier?

Answer: It weighs the same as a standard Mil Spec bolt carrier.

Question: Why didn’t you lighten it and make a low mass bolt carrier?

Answer: Maintaining the weight is necessary to achieving the balancing effect and because the BBC runs within the upper receiver and receiver extension in a straighter line it runs more smoothly resulting in faster sight recovery times while at the same time ensuring the inertia required to seat a dented or dirty round in the chamber.

Question: Does the BBC work in the M16?

Answer: Yes, the BBC has the full-length shroud for tripping auto and burst-fire sears, so the BBC may be installed in full-auto law enforcement, military and NFA approved rifles.

Review of the Balanced Bolt Carrier by Sootch00
Relia-Bolt and Balanced Bolt Carrier survived AR-15 Torture Test
Review of the Balanced Bolt Carrier by GY6vids
Average Rating: 5 of 5 Total Reviews: 121 Write a review »

  0 of 0 people found the following review helpful:
Best money I've ever invested! March 7, 2018
Reviewer: Everett Hunt from Springfield, TN United States  
My recent AR build was developed around this BCG. It took several months to acquire all of the parts. But once it was assembled it was smooth! During the barrel break-in period I noticed that this BCG had the smoothest actuation I have ever felt since my Military career! Excellent job SRC! I can't wait to try the FDE Zincronium Nitride XBP!

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  0 of 0 people found the following review helpful:
Balanced Bolt Carrier Group December 14, 2017
Reviewer: Jimmy from Fayetteville, NC United States  
Works great, matte finish wears easily, I don't know if it's suppose to. But those wear spots are slick as glass! I highly recommend this BCG.

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  0 of 0 people found the following review helpful:
Excellent product and even better service. March 13, 2017
Reviewer: Michael Fluken from Dacono, CO United States  
Recently purchased this new BCG for a new 5.56 rifle I built. Excellent quality. Even better service. Bolt was in my mailbox 4 days after purchase! I have fired the new BCG and 0 issues. Very smooth operation and very very heavy duty. Will buy another!

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  0 of 0 people found the following review helpful:
Don't use with Daniel Defense Magazines March 11, 2017
Reviewer: Stacy Adams from Shepherdsville, KY United States  
Bolt runs great with any other mag I have but when trying to run it with Daniel Defense mags, something with the bolt seems to get held up. I dont believe it to be a mag issue because I can use the mags in any other guns with no problems.

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  0 of 0 people found the following review helpful:
Np3 is the way to go March 9, 2017
Reviewer: Jared Pujol from Dyersburg , TN United States  
Very nice.. smooth as a baby's butt .. a fly tride to land on it and slide right off

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