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Will a Tokyo Marui metal upper fit a real Thompson lower?
http://www.forum.alienslegacy.com/viewtopic.php?f=4&t=20875
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Author:  DarthWilder [ Fri Mar 08, 2024 11:14 pm ]
Post subject:  Will a Tokyo Marui metal upper fit a real Thompson lower?

I'm looking for a metal airsoft Thompson upper to mate with a real Tommy gun lower. I can't find pics online of the bottom side of the Marui upper. I understand that some mods could be required, but overall dimensional differences would be a no go. Anyone have insight or experience with this? Thanks.

Author:  ilovethecorps [ Sat Jun 08, 2024 6:12 am ]
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I can send some pics of a TM upper for you

Author:  ilovethecorps [ Sat Jun 08, 2024 6:32 am ]
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I suspect there may be size differences which will make marrying uppers from Japanese replicas to original lowers as the Japanese replicas are made in metric…

Author:  DarthWilder [ Mon Jan 13, 2025 4:54 pm ]
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Thank you for the information. I haven't been able to find a metal Tokyo Marui and am now considering that the expense wouldn't be worth it for experimentation purposes.

For a stand-in, I have acquired a 1:1 resin copy that fits my lower and also fits a real working M1A1 bolt group. The issue is that I don't think it's durable enough to hold the weight of the barrel assembly.

I also have one of those solid aluminum uppers that can't fit a bolt group; so it's a bit of a trade off.

Author:  Erik_MAA [ Thu Jan 30, 2025 11:46 pm ]
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You could try a 3d print. The Paul's Boutique 3d files are pretty good.

Author:  septic [ Fri Jan 31, 2025 1:07 am ]
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Has anyone mucked about with a Denix Thompson (looks like they only do a 1928 version, which is annoying, but not "un-fixable").
I think I've read that the Denix is slightly over-sized? Still, it's a possible metal option, even if it's probably made of 'pig-iron'.

Author:  bigbisont [ Fri Jan 31, 2025 2:28 pm ]
Post subject:  Re: Will a Tokyo Marui metal upper fit a real Thompson lower

Are the cybergun/King Arms thompsons not just clones of the Tokyo Marui? They are really easy to find.

I've been meaning to touch up some parts on a pulse I made from a cybergun. I'll post picks of the upper's underside in this thread soon.


A bit pricey just to poach the upper from, but you may also consider the WE-Tech GBB thompson. All pretty heavy metal. Not sure if the additional blowback function internals would cooperate with a real one though. Still easier to find than a tokyo marui.

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