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Old 03-30-2019, 6:09 PM
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Default MAS 49/56 fastener assistance

Iím trying to remove the wood furniture from a MAS rifle. Iíve run into three situations:

The front barrel band has a two prong bolt head. Is there special screwdrivers available or do I have to make one with a flat blade screwdriver and a dremel?

63E2FB38-04E8-4273-ACFA-87DF8D9CFC67.jpg

The rear stock is held together by these two. The lower fastener is a combination slot screw with a star socket head. There is a metal tang that holds the star head from rotating (like a castle nut/cotter pin) and a socket would push that aside to loosen.

Notice the top slotted fastener has been peened/staked to prevent rotation.

So the question here is where to find a socket (for torque) and on the topside, how do I remove the ďstakedĒ bolt?


2BDDB27E-C34D-46F4-B400-4EE252A043F1.jpg

D2A55D5D-C167-4890-B103-F6B9B9C69D7B.jpg

Thanks,

Jason
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Old 03-30-2019, 6:25 PM
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45DDD286-1C9E-432F-A68C-06BE654BE166.jpg
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Old 03-31-2019, 12:08 AM
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Default

Quote:
Originally Posted by metalcruncher View Post
I’m trying to remove the wood furniture from a MAS rifle. I’ve run into three situations:

The front barrel band has a two prong bolt head. Is there special screwdrivers available or do I have to make one with a flat blade screwdriver and a dremel?

Attachment 791333

The rear stock is held together by these two. The lower fastener is a combination slot screw with a star socket head. There is a metal tang that holds the star head from rotating (like a castle nut/cotter pin) and a socket would push that aside to loosen.

Notice the top slotted fastener has been peened/staked to prevent rotation.

So the question here is where to find a socket (for torque) and on the topside, how do I remove the “staked” bolt?


Attachment 791334

Attachment 791335
There are pin spanner screwdriver bits.
McMaster has them.
You might also be able to find an 8 point socket that would fit that screw head, but I would just use a flat head screwdriver.
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Old 04-01-2019, 11:33 AM
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Default

Thanks Randall. The spanner bits I bought

86047EE1-3AC0-4FA7-9620-BC7BF4A7EB41.jpg

were too narrow so I had to bubba a wide screw driver and that worked on the front barrel band.

The eight point bolt was easily removed with a flat head screw driver once the tang was held back with safety wire.

24BBF214-3A45-4686-A149-2F772F04E222.jpg

1D8F46E2-2B00-4C3B-ABC5-8D47676561B7.jpg

As for the butt stock screw that was staked in, I tried but itís not going to budge and I donít want to damage it so itís going to stay as is. On another forum, some MAS enthusiasts talked about unscrewing the bushing that the screw is in from the bottom but that seems like it would cause more problems than solve.
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