Silverback Airsoft reveal their upcoming product for the Silverback SRS Sniper Rifle, the SRS F.A.S.T. Hop-Up Unit... "As many SRS users are looking for a tool-less adjustment Hop Up unit, we have developed a new optional Hop-up unit, in technical cooperation with the Faceless Sniper.

Here is the F.A.S.T Hop Up for SRS (Field Adjustment SeTting Hop Up).