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Sharps XPB Bolt Carrier Group 5.56 w/ DLC (Diamond Like Carbon) Coating

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  • Sharps XPB Bolt Carrier Group 5.56 w/ DLC (Diamond Like Carbon) Coating
  • Sharps XPB Bolt Carrier Group 5.56 w/ DLC (Diamond Like Carbon) Coating
  • Sharps XPB Bolt Carrier Group 5.56 w/ DLC (Diamond Like Carbon) Coating
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$225.33

Info

SKU:SSOSRCXPB-1

Info

SKU:
SSOSRCXPB-1

Description

 
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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Frequently Bought Together:

4 Reviews

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  • 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.

4 Reviews

  • 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

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