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Old March 12, 2009, 08:04 AM   #1
joyrock
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Underslung shotgun on a AR-15?

Is there a kit to make a mossberg mount to a ar-15? Or a Rem 700? Can it be done? I see 40MM and 37mm stuff, but thats a bit useless for hunting. I thought a 12ga, and a 223, would be great! Thanks!
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Old March 12, 2009, 08:50 AM   #2
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Problem #1 is, that combo is extremely heavy - if you didn't star alongside The Ahnold in Predator, you don't want to be carrying that setup around for more than a few minutes at a time.

Problem #2 is, if the shotgun barrel is short enough so as not to extend way past the AR15's barrel, it's a NFA firearm with $200 registration tax required.
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Old March 12, 2009, 09:04 AM   #3
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Can't remember who now, but someone used to sell kits to mount a Mossy Persuader under an AR. I never ordered one because it looked like it would add way too much weight to the front of the weapon. Even with the 18" barrel, the balance would be way off...at least for what I use an AR for.
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Old March 12, 2009, 01:48 PM   #4
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Problem #1 really is not that much of a problem. problem #2, I was thinking of a 18inch barrel. so that should be okish. i think.
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Old March 12, 2009, 02:07 PM   #5
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18" will be legal without the NFA paperwork but the shotgun barrel is gonna hang out there some beyond your rifle barrel and is gonna be heavy (back to problem 1).
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Old March 12, 2009, 02:40 PM   #6
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Quote:
Can't remember who now, but someone used to sell kits to mount a Mossy Persuader under an AR.
Cenier used to make one that was just like the one used in Predator. I looked but didn't see it listed on their site, so I guess due to unpopularity they don't make it/sell it anymore. I always thought that having something like this would Look cool....In a mall ninja sort of way. Would definately be a hendrance more than anything.
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Old March 12, 2009, 06:18 PM   #7
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I always loved the way it looked in Predator, but considered it a really impractical addition.

Especially the pump actions, now if you could get a autoloader that wouldn't stick out past the barrel, and could hold 2+1 rounds, it might be worth looking into.

Be a NFA weapon though.
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Old March 12, 2009, 07:48 PM   #8
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Remington actually makes this sort of thing. Note the "accessory weapon" part of it (an accessory rail mount is extra).

However, it is very much a NFA weapon and then there's the question of finding one; Remington doesn't seem all that interested in selling them to civilians, even those with the ATF's blessing.

I really don't know what you'd plan to gain with a mounted shotgun- the thing would be horrendously unwieldy.
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Old March 12, 2009, 09:35 PM   #9
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Quote:
Problem #1 is, that combo is extremely heavy - if you didn't star alongside The Ahnold in Predator,
You'd be a Governor or former Governor by now and wouldn't need to provide for your own security.
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Old March 12, 2009, 09:40 PM   #10
C Philip
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Problem #2 is, if the shotgun barrel is short enough so as not to extend way past the AR15's barrel, it's a NFA firearm with $200 registration tax required.
Short barrel shotguns are an AOW and as such only have a $5 tax stamp.
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Old March 12, 2009, 11:15 PM   #11
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No thats a SBS and a 200.00 tax stamp. AOW means no stock, if you lock it on a AR it has a stock and is a SBS.

unless you use a 18 inch barrel but that will be kinda long
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Old March 13, 2009, 04:26 AM   #12
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Why not just pay your money (big$) and put a 40 mil launcher

on the critter?
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Old March 13, 2009, 08:10 AM   #13
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Found one! Here at: http://tntarmoury.homestead.com/TNT1.html
Now I wounder if it will fit a mossy! I will find out! Thanks!
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Old March 13, 2009, 08:42 AM   #14
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I remember seeing one setup like that about 20 years ago at a gun show. Was always facinated by it.... but it seems to me that removing the stock of an 870 might cause some NFA issues. I'm not up-to-snuff on all the potential NFA issues it might create. Anyone know for sure?

Curious whether you purchased one from the company. Quality? Well built? Go together easily? Thanks
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Old March 13, 2009, 11:12 AM   #15
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Quote:
I remember seeing one setup like that about 20 years ago at a gun show. Was always facinated by it.... but it seems to me that removing the stock of an 870 might cause some NFA issues. I'm not up-to-snuff on all the potential NFA issues it might create. Anyone know for sure?

Curious whether you purchased one from the company. Quality? Well built? Go together easily? Thanks
You can get a pistol grip for it all right so I would assume cutting the stock off would be legal, however cutting the barrel under 18inches is not (without a sbs stamp). If you were mounting it (probably permantly) under the barrel of an AR wouldn't the AR's stock technically be the shotguns stock too? Thus keeping it over the overall length requirement?
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Old March 13, 2009, 11:54 AM   #16
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wow. I can't even imagine doing this. A single shot like an M203, but 12ga, sure, but a Mossberg persuader attached?
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Old March 13, 2009, 12:08 PM   #17
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To avoid having almost a foot of shotgun hanging out in your rifle's muzzleblast, you would need to whack the barrel and mag tube back to about that of a Serbu Super Shorty (10" or so).

This will leave you with a 2-round capacity. Since it will be attached to a carbine with a shoulder stock, it will be an SBS. There will be a $200 "making tax" to put it on a Form 4.

You will now have added about four pounds to the weight of your nine pound carbine in order to have a weapon that is useless for anything except maybe breaching doors. I would imagine that if your line of work involved a lot of door-breaching, your employer probably would have issued you something with which to breach them.

If you just want it for a toy, well, hey, it's America. Have at it!

Quote:
Originally Posted by C Philip
Short barrel shotguns are an AOW and as such only have a $5 tax stamp.
No, you are wrong.

Short-barreled shotguns have a $200 tax stamp.

Smoothbore pistols are AOW's (ie. shotguns that have never had a buttstock attached.) They have a $5 transfer tax. But they still cost a $200 "making tax" to register initially.

This would not apply here, since even if he were to obtain a bare receiver from the factory on which to build his project, the act of ading his faux Masterkey to his carbine would be de facto adding a buttstock.
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Old March 13, 2009, 01:07 PM   #18
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why? id much rather have a 40 mil gerende luancher
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Old March 22, 2009, 06:50 PM   #19
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Thanks Technosavant
Now there is another gun that I HAVE to have.
The Breaching Weapon,,,,Looks like an N frame Smith spent the night with an 870 and 9 months later delivered a,,,,,
I want one.
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