The Sharps XPB (Xtreme Performance) Bolt Carrier Group Complete is precisely machined from S7 tool steel. The XPB undergoes a 24-hour thermal cycle proprietary heat treatment and is finished with DLC (Diamond Like Carbon) Coating. The XPB Bolt Carrier Group displays the SRC logo machine cut and visible when the ejection port door is open. The XPB fits standard AR-15/M16/M4 rifles chambered in .223/5.56mm, 25-45 Sharps and 300 Blackout calibers.
Technical Data Bolt: S7 Tool steel, shot peened and DLC coated Bolt Carrier: S7 Tool steel, shot peened and DLC coated 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 firing pin 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
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Batch MPI and HPT tested Tensile strengths of 1550-1600 mpa, or 220,000-235,000 psi. Toughness of over 200 ft./lb. Charpy C-Notch HRC of 46 yields a 15% increase in hardness at the same toughness comparing to Carpenter 158 & 9310
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Technical Data on DLC Coating Coating thickness: 2 - 4 μm (Micro Meter) or 2-4 μ (Microns) Hardness HV 0.05: 2000 – 2800 or 80+ HRC Deposition method: PVD UBM/PACVD Friction vs. steel, dry: 0.1 Color: Carbon Black
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10 Reviews
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George H - Jul 2nd 2020
5
Best BCG out there!
Got this for $169. Best bcg on the market at a great price. Why pay more for a bcm or lantac when its inferior in every way to this. This is the 2nd one I have bought from sunny state. Great product, good price and fast shipping. Highly recommend.
Charles Marcus - Jun 20th 2020
5
Great work
Immediately, you see why you paid more for this BCG than a $99.95 nickel boron.
10 Reviews
George H - Jul 2nd 2020
5
Best BCG out there!
Got this for $169. Best bcg on the market at a great price. Why pay more for a bcm or lantac when its inferior in every way to this. This is the 2nd one I have bought from sunny state. Great product, good price and fast shipping. Highly recommend.
Charles Marcus - Jun 20th 2020
5
Great work
Immediately, you see why you paid more for this BCG than a $99.95 nickel boron.
Sean Johnson - Jun 2nd 2020
5
Sharps XPB bolt carrier group
I spent hours researching the ultimate BCG for my AR build and am absolutely confident that's what I got. Note only is the price reasonable, but I would have paid more for the quality in materials and machining this product provides. Having yet to be tested, once I do, I'm sure this will be in every of my future builds. I do hope I still get the discounts. Thanks for the fast delivery.
James - May 5th 2020
5
BCG
The best... awesome
Daniel Mondrella - Aug 7th 2019
5
Sharps BCG
Most reliable bolt carrier group I've ever used, it's my go to for every new build.
Andre Foster - Jul 16th 2019
4
Sharps xpb bcg
Excellent
J.W. - Jun 5th 2019
5
Sharps XPB BCG 5.56
I have put together only one AR15 .223 many years ago, so no expert. But I was starting to look to build up a few more before they get banned & wanted to see who was making better quality products. This Sharps BCG came highly recommended from another reviewer (on YouTube) as compared to several others being reviewed. The main aspect was the S7 grade steel, hardest steel being used for a BCG (as compared to other producers of BCG's) in the price point range. I think someone else is doing titanium BCG, but price is way out there. This was on sale at time of purchase, making it a good deal, even if it was twice as much compared to a carpenter 158 version. The bolt design was also another consideration, should not really need a forward assist version upper with the way the bolt lugs are cut.
Tony Johnson - May 16th 2019
5
Sharps XPB BCG
Well built.
Alex - Mar 28th 2019
5
Great bcg
Ordered for my first at-15 build. Came quickly and works like a charm.
Landis Meekins - Mar 26th 2019
5
Sharps XPB DLC BCG
Great action!! It glides and cycles without a hitch. Best of all so easy to clean