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Old 02-17-2013, 09:07 AM   #1 (permalink)
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Question Couple of PGP modding questions.

Evening gentlemen, I am currently modding one of my pgps so I thought I'd ask here before I do a few things as I don't want to muck up my body.

May be newbish questions but I'd really appreciate some advice.


First one is pretty simple. Is there any good way of determining the exact center line of the barrel so I can drill porting precisely. I have done measurements with calipers etc but I'm never quite happy with the line - any good tricks to make this easier?

Second is a bit more annoying for you guys but here we go; I'm going to cut out a section of the bottom tube so I can do a drop out 12 gram. There are millions of these around but I was wondering if anybody has a template of the cut and/or measurements from the front of the tube?

Thanks

Much appreciated

Adam
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Old 02-17-2013, 09:33 AM   #2 (permalink)
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On the other issue I'd leave it un ported as porting will reduce efficiency especially given its a shorter barrel. On the dropout question the tube is so short that where you would be cutting even with the pump all the way forward I doubt a 12g would actually drop out properly
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Old 02-17-2013, 09:38 AM   #3 (permalink)
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On the other issue I'd leave it un ported as porting will reduce efficiency especially given its a shorter barrel. On the dropout question the tube is so short that where you would be cutting even with the pump all the way forward I doubt a 12g would actually drop out properly
Oh sorry must clarify:

The project is not supposed to be practical in any sense

and

The pump is going to be completely removed so no issue of it being in the way
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