The Aliens Legacy
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Attaching SPAS cage to airsoft M1A1 Thompson
http://www.forum.alienslegacy.com/viewtopic.php?f=4&t=11613
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Author:  Heat2237 [ Thu Jul 05, 2012 2:45 pm ]
Post subject:  Attaching SPAS cage to airsoft M1A1 Thompson

Hello everyone. I have been a reading member of this forum for quite a while but don't post that often. I was hoping someone could help me out. I am in the process of building a pulse rifle and am having difficulty finding an adapter to attach the grenade launcher to the bottom of the Airsoft Thompson. Does anyone have any suggestions on the right way to do this? Or an adapter they want to sell? Any help will be appreciated.

Author:  88reaper88 [ Thu Jul 05, 2012 2:58 pm ]
Post subject: 

Two bolts through the front grip bracket on the Thompson and the holes in the spas cage, just the way the armourers did it for the film :)

Author:  PVB [ Thu Jul 05, 2012 4:31 pm ]
Post subject:  Re:

88reaper88 wrote:
Two bolts through the front grip bracket on the Thompson and the holes in the spas cage, just the way the armourers did it for the film :)

A lot of PRs on here use either the SD Studios upper receiver or the Tommin adapter, both of which make it a lot easier/stronger mounting.

See this thread for the SD Studios version:

viewtopic.php?f=3&t=6259

and here's the Tommin adapter:

viewtopic.php?p=136198

Author:  88reaper88 [ Thu Jul 05, 2012 4:36 pm ]
Post subject: 

Just offering another option Steve :)

Author:  PVB [ Thu Jul 05, 2012 4:39 pm ]
Post subject:  Re:

88reaper88 wrote:
Just offering another option Steve :)

Yup, no probs, but it must be a bugger to do well(or be not that strong, or everyone would do it. :D

Author:  Ttaskmaster [ Thu Jul 05, 2012 4:42 pm ]
Post subject: 

Are Tommin's adapters not still available?

Author:  88reaper88 [ Thu Jul 05, 2012 4:46 pm ]
Post subject:  Re: Re:

PVB wrote:
88reaper88 wrote:
Just offering another option Steve :)

Yup, no probs, but it must be a bugger to do well(or be not that strong, or everyone would do it. :D


Haha, it's the way I'm planning to do it so yeh it's probably a pain in the backside ;)

Author:  propmainiac [ Thu Jul 05, 2012 4:57 pm ]
Post subject: 

Hi all
I attached a aluminum plate to the top of the spas then attached another aluminum plate to the thompson where the foregrip mount is. Then I mounted them together with 4 screws. Very strong and secure. Both plates measure 1/8 each.

Author:  PVB [ Thu Jul 05, 2012 5:06 pm ]
Post subject:  Re:

Ttaskmaster wrote:
Are Tommin's adapters not still available?

Dunno, he's not on here often now to check, but someone might have one to sell. :)

Author:  Heat2237 [ Fri Jul 06, 2012 1:20 am ]
Post subject: 

Thanks everyone. Are Tommin's adapters still available?

Author:  Noble [ Fri Jul 06, 2012 6:25 am ]
Post subject:  Re: Attaching SPAS cage to airsoft M1A1 Thompson

I suggest extending the thompson barrel a little like the hero rifle.

Tommin's adapters take a small "pencil" diameter pipe.


To me, it makes the PR look off.

Author:  Ttaskmaster [ Fri Jul 06, 2012 3:00 pm ]
Post subject:  Re: Attaching SPAS cage to airsoft M1A1 Thompson

Noble wrote:
Tommin's adapters take a small "pencil" diameter pipe.


Oh... I've got someone else's, then.
Mine's an alu block with a roughly 1" dia recess for the Airsoft Thompson to fit into and a roughly 15mm slot the other side, for the usual diameter barrel. The underside has an alu strut that the GL bolts onto:

http://forum.alienslegacy.com/download/file.php?id=5461&mode=view

Author:  Xhiwar [ Fri Jul 06, 2012 7:20 pm ]
Post subject:  Re:

88reaper88 wrote:
Two bolts through the front grip bracket on the Thompson and the holes in the spas cage, just the way the armourers did it for the film :)



Certainly the way I'd go on a real Thompson, but I don't trust the durability of the pot metal on the airsoft M1A1. It's a bit too soft for my taste.

Cheers!
Roman

Author:  Heat2237 [ Fri Jul 06, 2012 10:45 pm ]
Post subject: 

I'm worried about the weak metal also. Propmainiac do you have any pictures of what you did with the metal plates?

Author:  propmainiac [ Sun Jul 08, 2012 4:13 am ]
Post subject: 

Hi Heat,
I woudnt worry about the strength. I have a CYMA airsoft and the strength is fine. I have pics of my custom made mount. Here they are.
The first pic is the launcher mounted to the thompson.
Attachment:
0903011155.jpg
0903011155.jpg [ 379.91 KiB | Viewed 6996 times ]


Attachment:
plate mounted to grenade launcher
mounting plate gl.jpg
mounting plate gl.jpg [ 294.04 KiB | Viewed 6996 times ]

all the screws need to be flush mounted. I used two allen head screws cut short, tapped out two holes and screwed the allen screws. for extra added strength i put a screw through the plates into the barrel mounting holes toward the receiver. Hope this helps. Feel free to ask questions.
Joe

Attachments:
plate mounted to the thompson
gl mounting plate thompson.jpg
gl mounting plate thompson.jpg [ 372.04 KiB | Viewed 6996 times ]

Author:  Heat2237 [ Sun Jul 08, 2012 2:37 pm ]
Post subject: 

Thanks Joe. That is exactly what I am going to try to copy. Thanks for the pics, they really help a lot.
Bryan

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