A small part with a big impact. The Taper Cap for 5.56 caliber barrels with a 1/2×28 thread from Sig Sauer is a reliable finishing touch to the entire setup – protecting the thread, looking great and ensuring maximum compatibility with the sealed tapered fit. Thanks to careful manufacturing and the 1/2×28 TPI (Threads Per Inch) thread, this cap fits perfectly. It is optimized for barrels of SIG MCX, SIG M400 and other current Sig Sauer 5.56 NATO weapons, so there is no play or unwanted vibrations. The result? Peace of mind and readiness for quick mounting of additional accessories.