I replaced my Longshot's plunger head with a hereticorp/CS style plunger head. The plunger head and plunger tube were both lubed with white lithium grease from Liquid Wrench. When I first fired it, ranges were 90-100 feet. But within five shots, the range had dropped ten or fifteen feet. When I opened it up, I found that the rubber washer seal was TOO good: It had pushed all of the lube down to the end of the plunger chamber. The lube had also bunched up around the rubber washer. I don't want to revert to an O-ring seal, but I'd prefer not to open the Longshot every five shots and cover the shaft in lube. Has anyone else ever encountered this problem?
I didn't think pictures were necessary by the way I described it, but if anyone needs to see them let me know.
P.S.- If it really matters, I'm running an AR-15/LS spring combo.
Thanks in advance.
I planned to have a large air resevoir tank made of PVC and endcaps, then attach it to the firing tank. You could have a semi-auto if you attached a barrel system straight to the firing tank, but ideally the valve I'm looking for would release the air when a certain pressure is reached behind it. This way, when the trigger is held down the air won't just blow through, it actually gives it a chance to pressurize. If you wanted both, you could set up some ball valve system.
Okay. So I'm looking for an air valve for a potential automatic homemade. Obviously I've googled it and I can't find what I'm looking for, so this is the next best thing. Anyways...
I need a valve that releases air when a desired pressure is reached. It's similar to a pressure release valve, but those wouldn't direct all of the airflow into a barrel or something similar. Any ideas?
I had this problem too. I used hot glue to secure my catch spring(s) to the catch piece. The glue created a kind of spacer underneath the springs, so the spring gets compressed more.
I know the standard size that is used for AR-15 springs is 4 3/4'', and the AR-15 spring and the [k26] aren't that different.
PM me if you get it working, I'm curious as to how this turns out.