The AR-STONER Trigger Group for the AR-15 and LR-308 (Small Pin .154") is a mil-spec replacement trigger group featuring a non-adjustable trigger pull. The trigger provides a smooth pull and crisp break, enabling the shooter to stay on target. This trigger is the perfect complement to the AR-STONER Customizable Lower Parts kits (sold separately).FeaturesSmooth and crisp single stage trigger pullCompatible with Mil-Spec lower receivers with .154" pin holesFor AR-15 or LR-308 platformsNote: Does not include trigger or hammer pins