With a crazy-fast reset, nearly nonexistent over-travel, and a smoother, crisper, lighter trigger pull, the RISE Armament RA 535 Advanced Performance Trigger (APT) helps you fire more quickly and accurately. Its highly regarded as the best of triggers. Now available with a black trigger blade, the RA-535 APT will not only improve the performance of rifles, but the look of it as well. The single-stage trigger group is easy to install. It also includes free anti-rotation pins.