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Old 12-09-2008, 06:06 PM   #1 (permalink)
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Question Backstop for Newer Style CCM Pump Kits

So I got the newer CCM pump kits with the cleaned up main guide rod. With the older style, an O-ring installed at the back of the rod served as a great bumper and backstop for the pump stroke. This no longer works with the new style, resulting in the hammer lug hitting the back of the lug slot as a backstop for the pump stroke. Or in the case of an MQ2 setup without the cocking rod, the pump stroke would be too long with handle's back plate hitting the end of the guide rod.

I'm looking for ideas on an alternative way to shorten the pump stroke, and preferably a clean way. The best idea I've come up with so far is inserting something like a cut down hard plastic rod into the lower pump guide hole in the handle. Any other ideas?
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Old 12-09-2008, 11:27 PM   #2 (permalink)
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I use a cut down piece of plastic in the lower guide hole, it works really well and looks super clean.
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Old 12-10-2008, 04:44 PM   #3 (permalink)
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my brother put a piece or macroline on the bottom guide on his s6 and uses it as a stop. works pretty good.
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Old 12-10-2008, 07:24 PM   #4 (permalink)
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Wish I had better pics but I think this one will do. I use a small stack (not just one,lol) of Oring on the main rod as a stop. Why exactly won't this work on the newer kits?


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Old 12-11-2008, 11:24 AM   #5 (permalink)
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Shorten the pump arm.
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Old 12-11-2008, 11:35 PM   #6 (permalink)
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Quote:
Originally Posted by fastev View Post
Shorten the pump arm.
yea i just cut mine to perfect length and re threadded it..

took me 2 trys but i got it the second time perfect.
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Old 12-12-2008, 03:18 PM   #7 (permalink)
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if you're using a return spring, try and find one big enough for the top guide rod, and just long enough that when it's fully collapsed to act as a stopper, killin 2 birds with one stone:P
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Old 12-12-2008, 06:05 PM   #8 (permalink)
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Or put a piece of surgical hose inside the pump rod return hole cut to the proper length. Inside the spring if need be.


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Old 12-12-2008, 11:42 PM   #9 (permalink)
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Quote:
Originally Posted by fastev View Post
Shorten the pump arm.
Quote:
Originally Posted by freebird View Post
yea i just cut mine to perfect length and re threadded it..

took me 2 trys but i got it the second time perfect.
What length did you guys cut your rods down to?
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Old 12-15-2008, 12:20 AM   #10 (permalink)
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What length did you guys cut your rods down to?
I didn't need to cut mine down. I'm running a return spring, and have my Sniper tuned for co2 so the combination of springs negates the need for a stop. The pump stroke gets progressively stiffer.
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