Designing a trigger that effortlessly sparks the most stubborn primers often conjures up the image of a trigger with a heavy pull, long travel, and a break that's more disappointing than getting socks for Christmas as a kid. The ZEROED(TM) Drop-In Trigger is none of those things.Made to ignite even the toughest steel case primers, the ZEROED trigger is compatible with a variety of AR platforms including AR15, AR10/LR-308, Mk47A(R), and DISSENTA(R) firearms. With a 4.5lb pull weight and single-stage operation, the ZEROED trigger is a great choice for compact personal defense weapons and long-range precision rifles alike. Single-stage operation 4 - 4.5 lb Trigger pull Drop-in design Crisp break Short reset travel ZEROED anti-walk trigger pins included