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Old 04-06-2007, 02:58 PM #1
tb311
 
 
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Shot a pump for the first time

Well I shot my half blocked cocker with a pump kit that I got at a local store, I think it might be a wgp pump kit. Anyways when I was shooting it I noticed that after every shot the pump handle would kinda jerk back a little bit and I was wondering if this was normal or does it have something to do with the way I installed the pump kit?
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Old 04-06-2007, 03:06 PM #2
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No, it's normal. It's just Newton's third law- the ball gets pushed out the barrel, so it pushes back on the bolt.
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Old 04-06-2007, 03:08 PM #3
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yep totaly normal, it can be reduced, but not eliminated with a stronger spring, but its really not hurting anything
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Old 04-06-2007, 03:11 PM #4
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you can hold the handle forward while shooting to ensure that all of the air pushing the ball forward is doing its job
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Old 04-06-2007, 03:13 PM #5
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Ok just wondering cause it kinda freaked me out the first time I shot it cause I had my hand on the pump and I thought I broke something.
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Old 04-06-2007, 03:17 PM #6
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you can hold the handle forward while shooting to ensure that all of the air pushing the ball forward is doing its job
Tis the correct way to shoot a pump anyway.

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Old 04-06-2007, 03:25 PM #7
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when i hold the handle, it makes the farting noise. but if i let it go back, it stays quiet. is their anyway that you can hold the handle so the backblock doesnt move, that the gun wont fart?
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Old 04-06-2007, 03:35 PM #8
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when i hold the handle, it makes the farting noise. but if i let it go back, it stays quiet. is their anyway that you can hold the handle so the backblock doesnt move, that the gun wont fart?
Replace the valve spring with a Red spring, from a madman kit. Or just a stiffer valve spring.

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Old 04-08-2007, 08:16 AM #9
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Or a lighter main spring with lowered regulator input.
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Old 04-08-2007, 08:33 AM #10
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Or accept that snipers make a small farting noise.
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Old 04-08-2007, 09:32 AM #11
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And enjoy it, farting noises are funny.
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Old 04-08-2007, 09:39 AM #12
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From my experience playing around with my snipers, you basically have to choose between air efficiency or noise when you're tuning. I've yet to come up with a spring/valve/input pressure combination (and believe me I've tried quite a few) that yields decent air efficiency while still letting the marker be whisper quiet and not burp.

Personally I just tune my snipers to be quiet, as the burping annoys me and I tend to play a lot of sneaky woodsball. The air efficiency isn't a huge deal since I run a 45/4500 on my sniper. Even with bad efficiency there's no way I could use up my tank even over the course of multiple games.
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