Elftmann Tactical

From Elftmann Tactical (elftactical.com):

Elftmann Tactical manufactures high performance drop-in triggers for AR-15 and AR-10 rifles in addition to other innovative firearms accessories. Our unique design is like nothing else on the market featuring aerospace grade sealed bearings and adjust-ability without the need for special tools or removal of the trigger from the lower receiver plus many more features. Our modular ELF AR-15 drop-in trigger is available for multiple shooting applications: 3-Gun competitors, Match, and Service (Law Enforcement and Military).