The KAC E3.2 bolt is now shipping with SR-15 5.56mm rifles and upper receiver kits.
The E3.2 bolt was purpose-built to provide extended service life and enhanced reliability in all conditions. The prominent dual ejectors ensure clean and consistent ejection even when a traditional high-backpressure suppressor is used. Refined lug geometry and optimized material selection ensures lug durability in excess of even the industry-leading KAC E3 bolt. A Viton O-ring prevents extractor vibration and lift, and a hard chrome exterior simplifies cleaning and maintenance.
For use with the KAC E3 barrel extension.
Somebody else used to manufacture an enhanced bolt with “lobster tail” extractor, maybe LMT?
I believe it was LMT