JP Enterprises LMOS Bolt Carrier Group with EnhancedBolt .223 AR-15 A Low Mass Carrier A Polished Stainless EnhancedBolt A SAE 9310 A Enhanced Ejector / Extractor / Gas Ring A 8.8 oz The JP Enterprises LMOS BCG is a low mass bolt carrier group for .223 AR-15 platforms. Low mass carrier removes reciprocating mass from the rifle's cycling for reduced felt recoil and faster sight recovery. High polish finish on roller-burnished bore. Carrier design prevents dust cover from closing when rifle is not fully in battery. Includes JP EnhancedBolt-polished stainless SAE 9310 steel bolt with enhanced ejector, extractor, and gas ring. Increased diameter cam pin hole eliminates the most common bolt breakages. Improved lug geometry reduces wear and eases locking/unlocking. Enhanced gas ring reduces internal friction while maintaining gas seal. Package includes carrier, bolt assembly, cam pin, firing pin, firing pin retainer pin, and instruction sheet. 8.8 oz. Not for use in .308 AR-type rifles. Low Mass Carrier LMOS design removes reciprocating mass for reduced felt recoil and less rifle movement. Roller-burnished bore and high polish finish for smooth cycling with proper lubrication. Increased bearing surfaces reduce wear. Longer mil-spec cocking pad for optimal reliability. EnhancedBolt - Polished Stainless SAE 9310 SAE 9310 steel bolt with polished stainless finish provides superior resiliency and extended lifespan over standard mil-spec bolts. Near-frictionless surface finish. Fully compatible with mil-spec sub-components. Increased Cam Pin Hole Diameter Increased diameter cam pin hole eliminates the most common bolt breakage point. Improved lug geometry reduces wear and eases locking and unlocking under sustained fire. Enhanced Ejector Enhanced ejector mitigates head case extrusions and reduces brass smear. The improved geometry addresses common ejection failure modes in standard mil-spec bolts. Enhanced Extractor Enhanced extractor optimizes extraction function and eliminates common ejection failures. The improved extractor geometry maintains positive case extraction across varied ammunition types. Enhanced Gas Ring Enhanced gas ring reduces internal friction and carrier wear while maintaining a near-indefinite gas seal. The improved ring geometry extends component life over standard mil-spec gas rings. Not for .308 Not for use in .308 AR-type rifles. Compatible with .223/5.56 AR-15 platforms using mil-spec bolt carrier and sub-components. Package Contents Includes carrier, bolt assembly, cam pin, firing pin, firing pin retainer pin, and instruction sheet. The JP LMOS BCG delivers low mass AR-15 cycling performance-polished stainless EnhancedBolt with SAE 9310 steel and enhanced ejector, extractor, and gas ring for reduced recoil and extended component life. Specifications: Manufacturer: JP Enterprises Model: LMOS Bolt Carrier Group with EnhancedBolt Caliber: .223 / 5.56 AR-15 Carrier Type: Low Mass (LMOS) Carrier Finish: High Polish (Roller-Burnished Bore) Bolt Material: SAE 9310 Stainless Steel Bolt Finish: Polished Stainless Ejector: Enhanced Extractor: Enhanced Gas Ring: Enhanced Cam Pin Hole: Increased Diameter Lug Geometry: Improved Mil-spec Compatible: Yes Weight: 8.8 oz Included: Carrier, Bolt Assembly, Cam Pin, Firing Pin, Firing Pin Retainer Pin, Instruction Sheet Not Compatible With: .308 AR-Type Rifles