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 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 Mk47� and DISSENT� 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 - ZEREOD anti-walk trigger pins included