Original price was: $225.95.Current price is: $214.65.

Out of stock

JP Enterprises LMOS™ Bolt Carrier:

  • Small-Frame (.223)
  • Stainless Steel
  • QPQ Black Finish
  • Includes JP Enhanced Gas Ring
  • Not for use in .308 AR-type rifles
  • Weight: 6.68 oz. with key installed

Out of stock

SKU: JPBC-3 Category:


For the no-compromise competition rifle, the JP Enterprises’ Low Mass Operating System (LMOS™) offers the most significant improvement in the felt impulse of the rifle compared to any modification other than the addition of a compensator. By reducing the reciprocating mass within the operating system, the bolt velocity is increased while simultaneously reducing the overall impulse experienced by the shooter with each shot. Consequently, LMOS™ equipped rifles have virtually no reciprocating mass feel and move less during cycling, allowing for much faster sight recovery and follow-up shots.

While use of the LMOS™ components is recommended only for competition and sporting use, this is only precautionary as their reliability is excellent, particularly on rifles with adjustable gas systems. Like all of JP Enterprises’ bolt carrier designs, LMOS™ carriers feature a 100% increase in bearing surface for smoother operation, improved alignment and lower wear in the upper receiver as well as the longer Mil-spec. cocking pad for optimal reliability. In fact, Team JP shooters have been using the LMOS™ system for over a decade without any reported operating system malfunctions at a match, and most every shooter that implements this operating system feel that it is proven to be a great performance improvement. Some shooters have even reported fewer unexplained flyers in their groups after switching to the LMOS™ system.

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