CMC Trigger Anti-Walk Pin Sets make the self-contained and easy-to-install AR-15 trigger groups even easier. The pin sets have been completely re-tooled to incorporate new design enhancements. CMC's AR-15 trigger groups have always yielded exceptional trigger pull dynamics for tens of thousands of satisfied customers. CMC is confident the new production tooling and setup, incorporating the most advanced methods available, will yield the highest quality for every AR-15 shooter who places the highest demands on quality, function and reliability, thanks to multi-patented designs. A fine match grade trigger pull is now an extremely simple upgrade to have.