Upgrade your AR-15 platform with the JP Enterprises FMOS Small-Frame Select-Fire Carrier Group featuring the JP EnhancedBolt. Engineered for select-fire applications, this complete bolt carrier group delivers exceptional reliability and smooth operation in demanding tactical environments. Key Features Salt Bath Nitride finish on both carrier and bolt for superior corrosion resistance, natural lubricity, and extended service life Full Mass Operating System (FMOS) design provides optimal cycling mass for consistent function, particularly beneficial in select-fire configurations JP EnhancedBolt constructed from SAE 9310 steel with improved lug geometry, larger cam pin hole, and enhanced extractor/ejector for superior extraction and reduced wear M16 carrier profile with full-length forward assist serrations and extended cocking pad for maximum compatibility and reliability Magnetic particle inspected components ensure structural integrity and safety Benefits for Shooters This carrier group addresses common pain points in AR-15 operation by offering smoother cycling, reduced friction through roller-burnished surfaces, and enhanced durability compared to standard mil-spec parts. The proprietary EnhancedBolt design minimizes failures associated with extraction, ejection, and cam pin stress while maintaining full compatibility with mil-spec subcomponents. Specifications Platform: AR-15 Cartridge Compatibility: .223/5.56 NATO/.300 BLK Carrier Profile: M16 Finish: Salt Bath Nitride (QPQ Black) Bolt Finish: Salt Bath Nitride Magnetic Particle Inspected: Yes Why Choose This Product Built with precision engineering from JP Enterprises, this assembly includes the carrier, EnhancedBolt, cam pin, firing pin, and retainer for a complete, drop-in solution. It delivers the reliability operators demand without compromising on performance or longevity.