KAK Industry K-SPEC Enhanced Features The KAK Industry K-SPEC Enhanced bolt uses a dual ejector system built around mil-spec ejectors and springs so no proprietary parts are required to run it. The ejector holes are centered on the lugs which avoids any reduction in the bolt s strength while still allowing the second ejector to do its job. This dual ejector layout increases ejection reliability and adds consistency to the ejection pattern a meaningful upgrade for shooters who have dealt with inconsistent ejection from a standard single-ejector bolt. KAK Industry has manufactured dual ejector bolts for the AR10/LR308 platform for over a decade and this bolt brings that same proven design down to the AR-15 platform. Machined from 9310 steel and finished in phosphate the K-SPEC Enhanced bolt is built to handle sustained use in a direct impingement AR-15 without a drop in durability. Because it is backwards compatible with all standard mil-spec BCG components it drops into an existing bolt carrier group without requiring any other parts to be swapped. The bolt ships complete and assembled so there is no additional fitting needed before it goes to work in the rifle. For AR-15 owners running 5.56 NATO or .300 AAC Blackout this bolt offers a straightforward reliability upgrade built on a design KAK Industry has refined for years. KAK Industry K-SPEC Enhanced Specifications Manufacturer: KAK Industry Model: K-SPEC Enhanced Type: Bolt Compatible Hosts: AR-15 Caliber: 5.56 NATO / .300 AAC Blackout Material: 9310 Steel Finish: Phosphate Color: Black Handedness: Right Hand Weight: 1.44 oz Available At: GrabAGun