The RRA Match AR-15 trigger kit is meticulously engineered for compatibility with mil-spec lower receivers, featuring 0.154 inches trigger and hammer pins. For those seeking enhanced stability, the kit also accommodates anti-rotation pins, while the option to use larger 0.1555 inches pins offers a more precise and snug fit. This trigger kit exemplifies the adaptability of AR-15 platforms, as it seamlessly integrates with AR-308 and DPMS LR .308 Cal style rifles, broadening its utility across various firearm builds. A standout feature of this kit is its lightened hammer, which significantly reduces lock time without compromising the reliability of primer ignition, even when using hard military surplus ammunition. This ensures consistent performance and accuracy, making it an ideal choice for both competitive shooting and tactical applications. Whether you're upgrading an existing trigger or assembling a new rifle, this fire control group delivers a custom-tuned experience at an accessible price point. Its precision engineering and versatile compatibility make it a valuable addition to any firearm enthusiast's collection, enhancing both performance and shooting satisfaction. Phosphate-coated, heat-treated cast steel Consistent and smooth two-stage trigger operation The overall pull weight ranges from 4.5 lb - 5 lb Standard curved trigger bow Compatible with AR-15 and AR-10 lower receivers featuring 0.154 inches diameter pin holes An ideal addition to your short-barrel rifle, designated Marksman rifle or duty rifle Hammer weight reduction to minimize lock time Cost-effective enhancement compared to standard military trigger assemblies