K-SPEC 450 Bushmaster /458 SOCOM Enhanced AR15 BCG- Down Vent, Dual Ejectors, Slotted Carrier Rails

450 Bushmaster/ 458 SOCOMFor enhanced functionality in adverse and rugged conditions such as sand, mud, dirt, and grime. These rail cuts are designed for debris disbursement, resulting in ultra-high functionality in the toughest conditions, including suppressor fouling and foreign contaminates. Strategically located angle cuts in the rails result in fouling and debris being moved into noncritical areas that are not in contact with the receiver and do not affect the function of the firearm. aka sandcutterDual ejectorsThe K-SPEC dual ejector system uses mil-spec ejectors and springs that require no proprietary parts. Ejector holes are centered on the lugs to avoid any reduction in strength of the bolt. The dual ejector system increases the ejection reliability and adds consistency to the ejection pattern. KAK Industry has been manufacturing dual ejector bolts for the AR10/LR308 platform for over a decade and has used that experience to create a durable and reliable dual ejector system for the AR15 platform.Designed to function reliably in the toughest conditionsDual Ejectors for enhanced reliabilityAngled Carrier Rail Cuts for flawless function in adverse conditions and prolonged suppressed use aka sandcutterFull Auto ProfilePermatex added between Gas Key and Carrier Mating SurfaceCarrier- 8620 steel, outside rails, bolt runs, and gas bores ground to .0002 tolerances, nitride finishBolt- 9310 steel, outside diameters ground to .0002 tolerances, MPI test, nitride finishFiring Pin- 8740 steel, Swiss turned, heat treated, precision ground, chrome platedCam Pin - 4140 steel, Swiss turned, heat treated, nitride finishExtractor- 4140 steel, fully machined, Phosphate coatedExtractor pin- S7 tool steel, ground, heat treatedEjector- S7 tool steel, ground, heat treatedGas key - 4130 steel, heat treated, secured with T25 torx fasteners, torqued to spec, staked with hydraulic staking machine11.5 oz