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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...
Read More...
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...
Read More...
1/1 found this helpful
Most Recent Reviews
Quality craftsmanship and overall finish, excellent fitment, the low mass helped reduced cyclic rate and increased ability to stay on target more efficiently
Most Recent Reviews
JP Rifles .308 bolt carrier by Tom, Verified Owner, November 12, 2025
The machining and finish on this item is impeccable. This is the lighter bolt so I recommend using this with the JP adjustable gas block
Most Recent Reviews
Jp Large frame bolt carrier by Mark, Verified Owner, September 30, 2025
Good quality in machining and QPQ finish. Purchased this for the bolt that came with a JP barrel. The bolt is properly head spaced for the barrel. JP has consistent quality in all their parts.
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.
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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/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
  • 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
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