Huma Air Arms Quickfill for S400/S500 (1117 - 1182)

A popular addition for the Air Arms S400, S500 and many more models that allows you to check the the pressure in the main pressure reservoir when you have a regulator fitted. They are easy to fit yourself, you simply remove your old quickfill or gauge, then screw the new quickfill with pressure gauge into your air cylinder. It replaces the quick fill on your rifle so that you have quick fill and a pressure gauge combined.  combined.