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Old 12-10-2012, 07:11 PM   #1 (permalink)
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.50 cal 'Cocker?

While sitting in Class today with nothing to do, I was thinking about my 'cocker project and from there, I started thinking about .50 cal, and pretty quick, whatever goes on up there spawned this:

How hard would it actually be to convert a 'cocker to shoot 50? I'd think that all that would need changing would be the bolt, detent, and barrel.

My solution for the barrel is simple enough, track down a planet eclipse .50 cal barrel. Already good quality, and would be a drop in and go type upgrade.

At least on paper, the bolt/breech would be fairly easy too. I imagine with a decant lathe and some time, a breech sizer and new bolt that works with the existing back block would be pretty easy to machine, and I bet if you drilled and tapped the side of the body for a set screw, it wouldn't go anywhere. The feedback could also be an answer: use it to hold the breech piece in like an eclipse kit.

The last thing I can think of is the detent. The only thing I can think of is a modified Check-it detent. Basically, its a normal 'cocker detent that you can take down and access the spring and ball bearing (http://cf.mp-cdn.net/9b/9c/d9affaccc...25d9b3bf90.jpg)

I imagine if you got an extended threaded housing portion and extended spring, it would work normally.

So what do you guys think? Has it ever been done before? Looked around a little but couldn't really find anything...
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Old 12-10-2012, 07:14 PM   #2 (permalink)
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I think you're on the right track.

IIRC CCM did a .50 marker for giggles.
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Old 12-10-2012, 07:16 PM   #3 (permalink)
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so who's gonna be the first brilliant bastard to realize the spoofed 250 cal?
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Old 12-10-2012, 07:18 PM   #4 (permalink)
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Old 12-10-2012, 07:21 PM   #5 (permalink)
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CCM did a .50cal T2
(i've thought about makin one too lolz)

Making an uppertube insert would not be difficult

If it were me....
I'd make it cocker threaded so it screws into the front of the marker
You could key it up so that your vert air hole lines up (probably an oring between the tubes)

a new bolt, reuse the old backblock with either a spacer for the bolt (so you dont have to use as big of stock to start) or just make a bolt that is 50 cal until the backblock then 68 for the backblock

detent wise... if its a perminant mod, i'd drill the insert/body out to use a cocker detent, or mill the insert for an ego detent and then have it be hidden when its screwed in

as for barrel... i'd pick up a spyder or eclipse.... and just reuse one
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Old 12-10-2012, 07:31 PM   #6 (permalink)
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There it is.
50 cal. pump
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Old 12-10-2012, 07:56 PM   #7 (permalink)
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I heared rumors of paintballgatway doing one a few years back come to think of it.

Anyways, i think a drop-in kit like eclipse's would be really cool.

Does anybody by chance know the i.d. Of a standard open faced cocker bolt? I have another idea...
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Old 12-10-2012, 08:08 PM   #8 (permalink)
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Bud Orr made one:



It was to prove a point that it could be done... Something about a town going to ban paintball or something or other, don't remember now.

It's not that hard to make one. We made our own make shift barrel to do our testing, and put it in a sniper.
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Old 12-10-2012, 08:18 PM   #9 (permalink)
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what are the benefits of having a .50 over a .68 other than shots per tank?
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Old 12-10-2012, 08:44 PM   #10 (permalink)
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what are the benefits of having a .50 over a .68 other than shots per tank?
do you wanna hear it from us or from people whose companies back that caliber?
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