JP Enterprises LMOS Bolt Carrier AR-15 .223 A Low Mass A Polished Stainless A Enhanced Gas Ring Included A 6.75 oz A JPBC-3SP The JP Enterprises LMOS Bolt Carrier is a low mass carrier for small-frame AR-15 .223 platforms. Polished stainless steel with roller-burnished bore and high polish finish. Includes JP Enhanced Gas Ring. Design prevents dust cover from closing when rifle is not fully in battery. Increased bearing surfaces for reduced wear. Longer mil-spec cocking pad for optimal reliability. 6.75 oz with key installed. Carrier only-bolt not included. Not for use in .308 AR-type rifles. SKU: JPBC-3SP. Low Mass Carrier LMOS design removes reciprocating mass for reduced felt recoil and faster sight recovery on AR-15 .223 platforms. Roller-burnished bore and polished finish for smooth cycling with proper lubrication. Polished Stainless Construction Stainless steel construction with polished finish. High polish carrier bore provides near-frictionless operation and extended component life. JP Enhanced Gas Ring Included Includes JP Enhanced Gas Ring-reduces internal friction and carrier wear while maintaining a near-indefinite gas seal over standard mil-spec gas rings. Carrier Only Bolt carrier only-bolt assembly not included. Compatible with mil-spec AR-15 bolt components including the JP EnhancedBolt. Not for use in .308 AR-type rifles. The JP LMOS Bolt Carrier delivers low mass AR-15 carrier performance-polished stainless with enhanced gas ring at 6.75 oz for reduced recoil cycling. Specifications: Manufacturer: JP Enterprises Model: LMOS Bolt Carrier SKU: JPBC-3SP Platform: Small-Frame AR-15 Caliber: .223 / 5.56 Carrier Type: Low Mass (LMOS) Material: Stainless Steel Finish: Polished Bore: Roller-Burnished Gas Ring: JP Enhanced (Included) Weight: 6.75 oz (with key installed) Includes: Carrier, JP Enhanced Gas Ring Bolt Included: No Not Compatible With: .308 AR-Type Rifles