- Low Mass Operating System bolt carrier
- Requires DPMS-pattern bolt, firing pin and cam pin
- Includes JP Enhanced Bolt Gas Ring
- Polished stainless steel
- 10.8 oz.
This bolt carrier is for any application where absolute reliability and reduced weight are the main criteria, the LMOS™, or Low Mass Operating System, with a 416 polished stainless steel special design carrier that includes a dust cover notch and a cut-out for use with the JP side charge system. The bore of the JP stainless carriers has a roller burnished finish for friction-less operation with no chance of peeling chrome as in standard mil-spec carriers. The exterior bearing surfaces are hand polished. When properly lubricated, both systems make your rifle feel like it was cycling on ball bearings.
The JPBC-4SP carrier provides a 100% increase in bearing surface for smoother operation and improved alignment and lower wear in the upper receiver. AR-15 semi auto configuration in the rear with the mil-spec longer cocking pad in the front for best reliability. This is one of the best designed and highest quality general purpose carriers on the market. Sold as carrier with installed key.
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