I had wrote about this problem/issue that I have w/my Prosport. So this is a shortened summary of what I had wrote before. So maybe/hopefully someone can tell me what's going on and how to alleviate it. Thank you before hand.
Ok members, I have a .177cal Prosport. I hear something moving/sliding inside the shroud area. The area I’m talking about is like a 4-5 inch area from the breach to where the metal tapers down to the barrel/shroud sleeve. So when I tip the rifle forward and backwards out in front of me with the butt in my right hand and the tip of the barrel in my left and dip the barrel down and up (we'll call it shaking for time saving/writing) is when I hear something is rolling/sliding.
My Prosport is tuned by none other than our Prosport doctor Nitrocrushr, who did an awesome job. The spring guide and top hat were done by a man who needs no introduction, Motorhead. Nitrocrushr helped me by trying to eliminate possible problems one at a time. First I made sure that all screws were tight/secured, I removed the scope to eliminate that possibility and still heard the noise. I then removed the action from the stock and checked the cocking lever's 2 screws (1 attaches to comp tube and the other attaches the cocking lever to the action/bottom of rifle) and they were very secure. I shook it again and I still hear it. I removed the guts and checked the spring, the guide the top hat, piston seal, the transfer port, the compression tube (which I left inside and attached to the cocking lever) and nothing was broken, damaged and/or missing. But I still hear the noise. I opened up the cocking lever all the way and left the breach area open, shook it and still heard it. I thought at first that it might be the delrin washers in the piston but when I removed the piston, those washers did not move what so ever. I am wondering if it could be a fragment of a pellet possibly. If so, then how could that be? Then I looked into the barrel from the muzzle end. Wondering if a baffle or an O-ring got clipped. I shined a flashlight in both ends and could see the o-rings and no damage was noticed nor did I see any other debris or damage.
I am at a loss. She still shoots superb and I know you guys/gals will probably suggest to leave it alone but the sound bothers me. I don't know what it is or how to find out. I do not want to remove the shroud because I am afraid of damaging the finish or being unable to put it back. Air Arms, I believe, has a lifetime warranty through PA (I think) but if I send it to them, they may just want to replace the rifle. Now if that happens, then I got to replace the JM spring with the oem one, replace the Motorhead guide and top hat with the oem ones along with the comp tube that came with it. I will also be giving up a Nitrocrushr lapped and polished barrel along with his tuning of the trigger. So I am at odds of going the PA route. So any and all help would be greatly appreciated as to my situation.
Do you hear the noise if the gun is cocked before you shake it?
If not and you only hear it when uncocked, then maybe the aftermarket spring is so short that it's completely uncompressed in the uncocked gun, leaving it free to slide back and forth on the guides, and that's what you hear moving.
If so, but you like how the gun's shooting now, it would probably be best to just learn to ignore the noise, since "fixing" it (e.g., by adding spacers) would be likely to change the tune.
IIRC, the plastic insert at the end of the shroud - faux crown - is simply pushed in and can be removed easily with a small piece of bent wire or hook. The baffles are likewise just pushed in - I think. I've read of PS users who have had that front piece fall out. I've had to push mine back in because it was working it's way loose. If you remove the plastic insert and baffles you can see what may be making the noise without removing the shroud. HTH
I think when you opened the gun up, your warranty is gone. Don
