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Questions & Answers
will this work with low profile dpms? Expert Answer

Yes, the JP Enterprises Low-Mass Large Frame Bolt Carrier is compatible with the DPMS family of AR-10 products.

by Ethan, Gear Expert, August 18, 2023
Does this fit in the sig 716? Expert Answer

The Sig 716i uses a proprietary bolt carrier group and is not compatible with any DPMS, Armalite, LR-308 etc. aftermarket bolt carriers.

by Ethan, Gear Expert, May 30, 2023
Customer Reviews
Helpful Positive Review Lightweight design reduces felt recoil by LensWork, Verified Owner, January 26, 2022
The LMOS design of this bolt carrier weighs 2oz. less than the standard JP bolt carrier, and while 2oz. doesn’t seem like much, it definitely reduces the felt recoil in my .308 Winchester Aero Precision M5E1. Any time that you can reduce the reciproc...
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8/8 found this helpful
Helpful Positive Review Worked better than expected by DaveK, Verified Owner, July 24, 2021
Went from a full mass Fail Zero NiB to this polished LMOS JP carrier and JP enhanced bolt group for a 16" mid gas 308 Proof carbon barrel with Seekins adjustable GB. Went with the standard weight JPSCS with a +1 buffer spring. Runs flawlessly with M1...
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1/1 found this helpful
Most Recent Reviews JP BCG for ar10 by Brandon Smith, Verified Owner, April 11, 2025
This is one of the best bcg's on the market for ar10's. Lightweight, strong, and smooth like butter.. It's not full auto capible, but it does run multiple calibers like 6.5cm, 8.6blk, and possibly others. Looks great and functions flawlessly.
Most Recent Reviews Excellent BCG for a great price by Enderwrath, Verified Owner, February 22, 2025
JP Enterprises makes the best rifle parts for competition. Optics Planet had the best price by far. Very happy.
Most Recent Reviews Awesome BCG, the best BCG I have ever had--FIT & FINISH GREAT!! by firstsgt, Verified Owner, July 14, 2024
Fits awesome with my JP bolt and JP .308 barrel!!!
Most Recent Reviews JP bolt carrier by J.B., Verified Owner, April 21, 2024
Have not had a chance to use at the range yet so I cant honestly speak about how it runs in the gun yet. Fit, finish and quality are way better than any other bolt carrier Ive used so far. Its very smooth in the reciever. Its a quality piece
0/1 found this helpful
Read All 10 Reviews
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Product Info for JP Enterprises Bolt Carrier for Large Frame

If you’re looking for Bolt Carrier Groups, you have to check these out! Designed for large-frame AR platforms, you can choose from a Low Mass Bolt Carrier or Full Mass Bolt Carrier depending on your needs, or buy one of each to swap them out whenever you want! Check out the specs and features below to pick out the perfect JPBC for your next build or to improve your current large-frame AR!image

JP Enterprises combines technology and cutting-edge designs to bring serious and recreational shooters high-quality firearms products at an exceptional value. Unlike most companies, JP Enterprises offers products and services based directly on the experiences of professional shooting competitors, including founder John Paul. This company actually puts its products to the test in national-level competitions. Whatever your application of choice may be, JP Enterprises has the perfect parts and accessories to improve your shooting experience.

WARNING: California`s Proposition 65

Specifications for JP Enterprises Bolt Carrier for Large Frame:

Manufacturer: JP Enterprises
Fabric/Material: Stainless Steel
Caliber: .308 Winchester
Gun Model: AR-10
Hand: Right
Condition: New
Projectile Caliber: .308 Caliber
Gun Frame Size: Large

Features of JP Enterprises Bolt Carrier for Large Frame:

Full Mass Operating System

  • 416 stainless steel Full Mass Operating System (FMOS™)
  • Extended forward assist serrations
  • Dust cover notch
  • Longer Mil-spec. cocking pad
  • Roller-burnished for frictionless operation
  • QPQ (Quench-Polish-Quench)
  • 100% increase in bearing surface

JP Low Mass Operating System

  • Low Mass Operating System (LMOS™)
  • Recommended only for competition & sporting use
  • 100% increase in bearing surface
  • Longer Mil-spec. cocking pad

Package Contents:

  • JP Enterprises Bolt Carrier for Large Frame
  • See specific models for included accessories

JP Enterprises Bolt Carrier for Large Frame Orderable Models

List of Orderable Models

JP Enterprises Full Mass Bolt Carrier For Large Frame, .308, 416 Stainless w/QPQ and Jpegr-308 Enhanced Gas Ring, Black JPBC-5 , MPN: JPBC-5 , UPC: 812872023830 , Code: J5-ABA-JPLFC-JPBC-5
JP Enterprises Stainless Steel Low Mass Bolt Carrier For Large Frame, .308 w/Enhanced Forward Assist Serrations, 416 Stainless w/Special Polish, Stainless JPBC-4SP , MPN: JPBC-4SP , UPC: 812872020594 , Code: J5-ABA-JPLFC-JPBC-4SP
JP Enterprises Stainless Steel Low Mass Bolt Carrier For Large Frame, .308 w/Enhanced Forward Assist Serrations, 416 Stainless w/QPQ, Black JPBC-4 , MPN: JPBC-4 , UPC: 812872020587 , Code: J5-ABA-JPLFC-JPBC-4
JP Enterprises Full Mass Bolt Carrier, .308 w/JPEB-308 JP Enhanced Bolt w/Cam Pin, Firing Pin And Firing Pin Retainer, Black JPBC-5A , MPN: JPBC-5A , UPC: 812872023847 , Code: J5-ABA-JPLFC-JPBC-5A
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