A Pocket silencer has two Picatinny rails on it and you can adjust the place to be 12 / 6 o'clock or 3 / 9 o'clock.
Caliber: .17HMR, .22, .22 Magnum
Threadings: 1/2-20UNF and 1/2-28UNEF
You can use as one silencer or 2 Pocket silencers together to decrease 35dB.
It is possible to mount a SAK silencer to the front of the SAK Pocket silencer to decrease 35dB.