DROP IN trigger group DRASTIC GEN 2 model made by MIMTAC for NJ Arms suitable for all categories of weapons of the Ar15, Ar10 and Ar15 9mm family made of 7075T6 aeronautical aluminum, single stage trigger, trigger weight 1.5 kg, reduced and net stroke, compatible with all calibers of the AR system, very simple assembly supplied with two anti-slip pins, Compatible for all .223R, 300 AAC, .308w and 9mm calibers