YHM developed this Q.D. Adapter to convert existing suppressors from other manufacturers to use our much simpler mounting mechanism. This is the same mount design that YHM has been using on their Q.D. suppressors since 2005. Due to its simplistic design there is virtually no way to incorrectly install the suppressor and risk the chance of it coming loose yet it provides easy removal. To install simply remove your existing mount from your suppressor and thread in our Q.D. adapter. This will allow you to use YHMs Q.D. flash hiders or muzzle brakes which are sold separately. Allows the use of YHM Q.D. Mounts to be used with suppressors that utilize 1-3/8″-24 threads.