Home > All Products >

Cosmetically Blemished Sharps XPB Carrier Group Complete - FDE
Cosmetically Blemished Sharps XPB Carrier Group Complete - FDE
Sharps Rifle Company XPB (Xtreme Performance Bolt) Carrier Group Complete - FDE


These BCG's are brand new in original product packaging and 100% functional but may have cosmetic imperfections/blemishes.

Please note:

  • Pictures are not of the actual blemished product.
  • No refunds or exchange will be issued unless they don’t function as intended.
Your Price: $219.99
Sale Price: $139.99
Savings: $80.00

Stock Status:(Out of Stock)

Availability: Usually Ships in 3 to 5 Business Days


The Sharps Xtreme Performance Bolt (XPB) Carrier Group Complete- FDE has the same design as the Balanced Bolt Carrier Group and is precisely machined from S7 tool steel. The XPB undergoes a 24-hour thermal cycle proprietary heat treatment and is finished with ZrN (Zirconium Nitride) Coating. The XPB Carrier Group Complete 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 ZrN coated (U.S. Patent No. 9,863,729)
Bolt Carrier:
S7 Tool steel, shot peened and ZrN coated
Gas Key: 4130 Steel, attached with Grade 8 hardware, properly staked and ZrN 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

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

Technical Data on ZrN Coating

Coating thickness: 0.2 - 0.5 Microns
Hardness HV 0.05: 1500-1800 or 70+ HRC
Deposition method: PVD UBM/PACVD
Friction vs. steel, dry: 0.5
Color: Flat Dark Earth

Average Rating: 5 of 5 Total Reviews: 1 Write a review »

  0 of 0 people found the following review helpful:
Best BCG available! March 13, 2018
Reviewer: Everett Hunt from Springfield, TN United States  
I have years of experience with the M-16/M-4/AR-15 platform from my military service. Typical Mil-Spec BCGs have a "clunky" feel to them. These literally are the smoothest actuating BCGs I have ever fired!

I was fortunate enough to acquire two Balanced Bolt Carriers (BBC) in NP3 before they were discontinued, and I have always been impressed with how perfectly and steadily they ran. So I made the decision to purchase two of the new XPBs in either coating, the Diamond Like Coating (DLC) with the Hyper Black polish, & the FDE Zirconium Nitride (ZrN) coating. WOW!

SRC continues to impress with their products! SRC’s design is precisely what was needed to drop the fouling and failure rates of this rifle platform to zero and NOT break the bank! This is the best improvement ever made for the AR-15! Excellent job SRC! If you are considering purchasing either of these XPBs for your AR, you WILL NOT be disappointed!

Was this review helpful to you?

SRC Arms