Sharps Xtreme Performance Bolt (XPB) Carrier Group Complete in DLC (Diamond Like Carbon)


Sharps Xtreme Performance Bolt (XPB) Carrier Group Complete in DLC (Diamond Like Carbon)

$219.99 $169.99

Rated 5.00 out of 5 based on 30 customer ratings
(30 customer reviews)

The Sharps Xtreme Performance Bolt (XPB) Carrier Group Complete is comprised of our patented Relia-bolt, and our Balanced Bolt Carrier.  Both Balanced Carrier and Relia-Bolt are coated in DLC (Diamond Like Carbon) Coating.

160 in stock (can be backordered)

SKU: SRCXPBCG Categories: , , ,


The Sharps Xtreme Performance Bolt (XPB) Carrier Group Complete is comprised of our patented Relia-Bolt™  and our Balanced Bolt Carrier.  Both are machined out of S7 tool steel. The XPB undergoes a 24-hour thermal cycle proprietary heat treatment, and is finished with the DLC (Diamond Like Carbon) Coating.  The XPB carrier displays the SRC logo machine cut and is visible when the ejection port door is open. The XPB fits standard AR-15/M16/M4 rifles chambered in .223/5.56, Sharps 25-45, and 300 Blackout calibers.

 Color: Carrier and Bolt DLC (Diamond Like Carbon) Black

We offer a 30-Day Money Back Guarantee on our complete line of Sharps bolt and bolt carrier products.

90 Day Warranty

If any Relia-Bolt™ is found to have defects in materials or workmanship, SRC will repair or replace it at no charge.

Technical Data:

Bolt and carrier: S7 tool steel, shot peened and DLC coated (U.S. Patent No. 9,863,729)
Gas key: 4130 Steel. attached with Grade 8 hardware, properly staked and DLC coated.
Cam pin: 4340 Steel, Manganese Phosphate coated
Firing pin: Mil spec made of 8740 Steel, center-less ground, and Hard Chrome coated.
Extractor: 4340 Steel, Manganese Phosphate coated
Ejector: S7, shot peened and Manganese Phosphate coated
Extractor pin: S7, shot peened and Manganese Phosphate coated
Mil-Spec Extractor and Ejector springs, Firing pin retaining pin, Gas Rings

Batch MPI and HPT tested
Tensile Strengths of 1550-1600 mpa, or 220,000-235,000 psi.
Toughness over 200ft/lb Charpy C-Notch
HRC of 46 yields a 15% increase in hardness at the same toughness comparing to Carpenter 158 & 9310.

Technical Data on DLC Coating

Coating thickness: 2-4 Microns
Hardness HV 0.05: HRC 80+
Deposition methid: PVD UBM/PACVD
Friction vs Steel, dry 0.1
Color: Black

Made in the USA

Additional information

Weight 11.20 oz

30 reviews for Sharps Xtreme Performance Bolt (XPB) Carrier Group Complete in DLC (Diamond Like Carbon)

  1. Rated 5 out of 5

    Jose Santiaguel (verified owner)

    The best ever bolt carrier I ever bought. I hope you guys will make a bolt carrier for 308.

  2. Rated 5 out of 5

    Dorian Miller (verified owner)

  3. Rated 5 out of 5

    Raymond (verified owner)

    Awesome looking product had the opportunity to fire my .300 blackout Springfield Saint pistol with the new bolt and just an amazing product. Very easy to clean thanks guys

  4. Rated 5 out of 5

    James (verified owner)

    Sharps has absolutely the best bolt of many that I have tried from different manufacturers, on bolt carriers you get what you pay for and sharps you get alot of quality for the price. It’s not my first from them and it won’t be the last. Thanks again

  5. Rated 5 out of 5

    Merickwise (verified owner)

    I have had flawless operation with the first XPB BCG that I purchased. Cleaning is fast and easy even with the dirtiest of ammo. Requires only the slightest amount of lubrication and I have not seen any ware. I feel so good about this bcg that when I sat down to build my wife an AR I knew this was one of the parts that would be in it.

  6. Rated 5 out of 5

    J W (verified owner)

    Slick, Clean, Excellent

  7. Rated 5 out of 5

    Peter Brandt (verified owner)

    Received my order very quickly and in perfect condition the coating is so smooth have put about 100 rounds thru it cycles great . So far so good

  8. Rated 5 out of 5

    Eddie (verified owner)

    Love this BCG.

  9. Rated 5 out of 5

    MattyAZ (verified owner)

    This BCG lives up to its reputation. Not one single misfire or extraction. Recoil seems a bit less as well, but could be me. Ran 120 rounds straight with a binary trigger. No issues. Cleanup was a breeze. Tiny bit of solvent on a rag and some wiping cleans it right up. Will definitely buy again for other ARs.

  10. Rated 5 out of 5

    Albert Egreczky (verified owner)

    Bolt carrier received in a timely manner. Quality and workmanship is excellent. Works great in my AR-15. Met all my expectations.

  11. Rated 5 out of 5

    Erik (verified owner)

    Slick as snot first of all. Second the bolt is a nice upgrade to the DI AR’s.

  12. Rated 5 out of 5

    Zachary Barker (verified owner)

    So far so good, but haven’t got to put it to the test as it is for a new build that isn’t complete yet.

  13. Rated 5 out of 5

    Victor Vargas (verified owner)

    XPB BCG looks amazing and works great. Extremely satisfied, will definitely be use more XPB BCG in future builds

  14. Rated 5 out of 5

    Joseph R. (verified owner)

    Received this bolt carrier group quickly and once I opened it the fit and finish is great. Performs wonderfully and look forward to using these bcgs for all future builds. If you’re considering this item, you won’t be disappointed.

  15. Rated 5 out of 5

    Tino Saenz-Diez (verified owner)

    Excellent Quality and Great Customer Service

  16. Rated 5 out of 5

    Demetrios Logan (verified owner)

    Ordering process was smooth, shipping was fast and product is superb!

  17. Rated 5 out of 5

    Anthony Jackson (verified owner)

    Always fast shipping, on the best BCG for me.
    Thanks again.

  18. Rated 5 out of 5

    Larry Sartin (verified owner)


  19. Rated 5 out of 5

    brian tran (verified owner)

  20. Rated 5 out of 5

    William (verified owner)

    Very nice for the money. Hell, pretty nice period. cycles very smooth.

  21. Rated 5 out of 5

    Steve Broom (verified owner)

  22. Rated 5 out of 5

    Frederick Bryant (verified owner)

    I purchased a XPB carrier group from Sharps and checked the headspace in it. Everything was great. The DLC was slick to the hand and it ran flawlessly with the 500 rounds I put down range after checking the headspace. I’m very pleased with the overall performance and extremely pleased with the fast shipping to my home. Sharps, I’ll be purchasing another soon. Thanks

  23. Rated 5 out of 5

    Robert Binnion (verified owner)

    I’ve always purchased the cheapest BCG I could get. I mean mil-spec is all the same right? Sharps has changed my thinking, they have built the better mouse trap. I usually put my money into the barrel and trigger group. This BCG completes the the firing line. This is more than an upgrade. It is a necessity

  24. Rated 5 out of 5

    JR (verified owner)

    Skip the fancy names. You want an amazing BCG, look no further. This BCG runs like it was born in my rifle.

  25. Rated 5 out of 5

    ABEL RAMIREZ (verified owner)

    I just received this bolt less then a week ago to finish my SPR. THIS BOLT HAS A GREAT FINISH. I have not took it to the range but after all my reach I feel confident it will be the best I’ve owned. Shipping took longer then expected but it is the time of the holidays and I’ll blame it on that. Over all I am happy with the service from SRC.

  26. Rated 5 out of 5

    Aric Jester (verified owner)

    I purchase another bcg and love it. Thanks for continuing to male such great quality items.

  27. Rated 5 out of 5


    Purchased my bcg through a different retailer since it was on sale. Im currently trying to track down another. These bcg’s are a must for me now. The entire bolt has been reinvented by these guys. No need to spend 300+ dollars on high end bcgs. The price point on these sharps bcgs is surprisingly low considering the quality and craftsmanship that goes into them.

  28. Rated 5 out of 5

    Luis Orti mz (verified owner)

    I really love the performance of this bolt carrier group. I would definitely buy another. Maybe in fde or nickel boron next time. 👍

  29. Rated 5 out of 5

    Kennedy (verified owner)

    Finally I cleaned my rifle after 3000 rounds (Not shooting at the same time). Every-time I fired that weapon the bolt performed awesome. I have couple of the DLC bolt carriers and I love it. I cleaned the bolt and it looks like the day I bought it. Wow!!!

  30. Rated 5 out of 5

    taxguypro (verified owner)

    First complete BCG I bought several years ago was NP3 coated then, with logo and bucking bronco stamped on the front most part of the viewable part of the BCG, wished SRC still did that! Of course that made my plain Jane AR 15 look cool, the BCG made it a new gun! I have now purchased several for rebuilds and new build rifles. I keep coming back I have to admit I have tried other, most of them end up in the parts box others are ok enough to put the Relia Bolt in. Others may have the DLC on their BCG but they are not as finely finished and balanced like a full blown SRC BCG in DLC or the Nickel Boron BCG , that looks real nice in my new heavy stainless steal 18 in barrel build I am just completing.

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