Adding a mag cut off to an 870?

Scott Conklin · November 25, 2012, 05:34 AM

OK, do not yell at me. It's just a thought I had while tinkering with a couple of Chinese parts guns I picked up recently. At first glance it appears doable. And I'd rather butcher an already less-than-pristine Chinese receiver in the attempt as opposed to a real 870.

But in an admittedly not extensive internet search I found nuthin'. No indication anyone has even tried this. So...nobody wanted to thrash a good receiver? Or there's a reason it can't be done that I didn't see? It looks like there's a perfectly good 5/8ths of an inch of receiver/tube overlap I could bore and use...an oversize safety button on. Or any number of other things even if I had to make the inner contact piece... Thoughts?

James K · November 27, 2012, 08:08 PM

I have not studied the issue, but I would guess that with enough money it could be done, I am just not sure why. A cutoff is normally put on an autoloading gun to keep a shell from automatically feeding from the magazine so special shells can be loaded manually one at a time. But pump guns won't feed anything automatically, and most pumps allow loading shells manually without a cutoff.

Jim

Scott Conklin · November 27, 2012, 09:46 PM

Primarily just a matter of curiosity. These two Chinese knock-offs have to be completely gone thru regardless and it was just something I'm considering tinkering with unless there is some definite reason not to.

James K · November 30, 2012, 12:36 PM

I can't think of a reason not to do whatever you want. They are your guns.

Jim

publius · December 15, 2012, 10:33 PM

I don't see why it couldn't be done but I just slowly open my action far enough to remove the shell from the chamber.

November 25, 2012, 05:34 AM	#1
Scott Conklin Senior Member Join Date: November 18, 2000 Location: B.F.E. Posts: 1,721	Adding a mag cut off to an 870? OK, do not yell at me. It's just a thought I had while tinkering with a couple of Chinese parts guns I picked up recently. At first glance it appears doable. And I'd rather butcher an already less-than-pristine Chinese receiver in the attempt as opposed to a real 870. But in an admittedly not extensive internet search I found nuthin'. No indication anyone has even tried this. So...nobody wanted to thrash a good receiver? Or there's a reason it can't be done that I didn't see? It looks like there's a perfectly good 5/8ths of an inch of receiver/tube overlap I could bore and use...an oversize safety button on. Or any number of other things even if I had to make the inner contact piece... Thoughts? __________________ "Once the monkeys learn they can vote themselves bananas, they'll never climb another tree." - Heinlein www.libertydwells.com

November 27, 2012, 09:46 PM	#3
Scott Conklin Senior Member Join Date: November 18, 2000 Location: B.F.E. Posts: 1,721	Primarily just a matter of curiosity. These two Chinese knock-offs have to be completely gone thru regardless and it was just something I'm considering tinkering with unless there is some definite reason not to. __________________ "Once the monkeys learn they can vote themselves bananas, they'll never climb another tree." - Heinlein www.libertydwells.com

December 15, 2012, 10:33 PM	#5
publius Senior Member Join Date: January 25, 2005 Location: Mississippi/Texas Posts: 2,505	I don't see why it couldn't be done but I just slowly open my action far enough to remove the shell from the chamber. __________________ "Suppose you were an idiot, and suppose you were a member of Congress, but I repeat myself." Mark Twain

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November 27, 2012, 08:08 PM	#2
James K Member In Memoriam Join Date: March 17, 1999 Posts: 24,383	I have not studied the issue, but I would guess that with enough money it could be done, I am just not sure why. A cutoff is normally put on an autoloading gun to keep a shell from automatically feeding from the magazine so special shells can be loaded manually one at a time. But pump guns won't feed anything automatically, and most pumps allow loading shells manually without a cutoff. Jim

November 30, 2012, 12:36 PM	#4
James K Member In Memoriam Join Date: March 17, 1999 Posts: 24,383	I can't think of a reason not to do whatever you want. They are your guns. Jim