Introducing the K-SPEC Sand cutter rail system, engineered for superior performance in the harshest environments. Designed to excel in adverse and rugged conditions, this innovative rail system is your ultimate solution for maintaining functionality amidst sand, mud, dirt and grime. The strategically designed rail cuts facilitate efficient debris disbursement, ensuring ultra-high functionality even in the toughest scenarios, including suppressor fouling and exposure to foreign contaminants. The K-SPEC Sand cutter features strategically located angle cuts that channel fouling and debris into noncritical areas, away from the receiver, thereby preserving the firearm's operational integrity. This design innovation ensures that debris does not compromise the firearm's performance, making it an ideal choice for challenging environments. Complementing the rail system is the K-SPEC Dual ejector system, which utilizes mil-spec ejectors and springs, eliminating the need for proprietary parts. The ejector holes are precisely centered on the lugs, maintaining the bolt's structural strength. This dual ejector system enhances ejection reliability and ensures a consistent ejection pattern, providing you with dependable performance every time. With over a decade of experience in manufacturing dual ejector bolts for the AR10/LR308 platform, KAK Industry has leveraged its expertise to develop a robust and reliable dual ejector system for the AR-15 platform. Trust in the K-SPEC Sand cutter rail system for unparalleled durability and performance in the most demanding conditions. Engineered to operate dependably in the most challenging environments Dual ejectors designed to improve reliability Angled carrier rail cuts ensure optimal performance in challenging conditions and during extended suppressed use, commonly referred to as a "sand cutter" design Automatic profile configuration Permatex has been applied between the gas key and the carrier mating surface Firing pin - constructed from 8740 steel, Swiss-turned, heat-treated, precision ground and chrome-plated Cam pin - constructed from 4140 steel, precision Swiss-turned, heat-treated and finished with a phosphate coating Extractor - constructed from 4140 steel, fully machined, with a phosphate finish Extractor Pin: manufactured from S7 tool steel, precision ground and heat-treated Ejector - S7 tool steel, precision ground and heat-treated The carrier is constructed from 8620 steel, with the outer rails, bolt paths and gas bores precision ground to tolerances of 0.0002 inches It features a chrome-lined phosphate finish Bolt - constructed from 9310 steel, with external diameters precision ground to tolerances of +/-0.0002 inches Subjected to magnetic particle inspection (MPI) testing and finished with a phosphate coating The gas key is constructed from 4130 steel and has undergone heat treatment It is secured using T25 torx fasteners, torqued to the specified requirements and staked with a hydraulic staking machine The finish is chrome-lined with a phosphate coating