On the right side of the receiver, just above the upper edge of the stock, you'll find a small hole with a button-head screw (2mm hex). Remove that screw and deep inside is the power adjust set screw (1.5mm hex). Rotate the hex key clockwise (inward) to reduce the power. A small turn of the hex key ...

My HFT 500 started running low recently, like 100 fps slower than normal! I discovered that the power adjust screw had walked its way in restricting the air flow. I backed it out and got it running about where it was before. Perhaps yours is doing the same. That being said, the power adjust screw is...

Howdy folks. I recently discovered that one of the screws holding the barrel in place on my HFT500 had backed out a bit. I screwed it back in and attempted to match the torque of the other two screws, but I would love to torque it to factory spec. Does anyone know what the proper torque should be or...

I just did some pellet testing for my HFT 500 and confirmed that it likes the Air Arms Field Heavies (10.3) the best over any JSB's (8.4's and 10.3's) and H&N's (9.5's and 10.65's). I'm not in the UK so I've adjusted the speed and hammer spring to shoot the 10.3's at about 765fps. All rifles can hav...

Well, since I posted this yesterday I discovered a video for the s510 that showed me what I was missing... the four screws in front of the trigger! Glad to say the striker rod and striker looked good. I did hit the striker rod with some 1500 grit sandpaper to polish it up a bit more and did some jud...

Howdy folks, For the life of me I can't figure out how to disassemble the HFT 500, specifically removing the striker body from the rest of the components. I also can't seem to get the trigger group off the striker body but I'm guessing there is another screw holding it on from the inside which I wil...