The OCL ZRo Direct Thread Adapter is made to work with industry standard 1.375x24 threaded suppressors. The ZRo DTA was made to add as little length to the system as possible while being as light as possible. Made from 6Al-4V grade 5 titanium and finished with a dark gray rainbow PVD coating the ZR0 DTA comes in at 1.1 oz in 5/8×24 and 1.2 oz in 1/2×28.