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emòtènculo
May 21st, 2008, 11:33 AM
I'm looking for dimentions about a .22LR magazine (AR-7 like). Anyone can help me? Thanks
tomu
May 21st, 2008, 03:24 PM
Search for "Bill Holmes, Home Workshop Guns for Defense and Resistance: The .22 Machine Pistol" scanned copies are floating around.
emòtènculo
May 22nd, 2008, 02:23 AM
I read the book and the dimentions Holmes gives in it are ... let's say ... they could be a little better.
I've compared them with a .22LR dummy and the length is OK, BUT they are too large.
file
May 22nd, 2008, 03:48 AM
Your best bet is to make a cardboard mockup first of whatever it is you do.

The AR-7's mag isn't the best and is responsible for most of it's reliability problems, But give it a shot anyway and see.
emòtènculo
May 22nd, 2008, 06:36 AM
I know that the main feed problem in this rifle is a magazine issue, that's why I want to make the magazines by myself, but I miss how wide they shoul be.
tomu
May 22nd, 2008, 09:44 AM
The base diameter of a .22 lr is 7.06 mm, so make it at least 7.2 and max. 7.3 mm inside. For the length go for about 25.60 mm to about 25.70 mm, overall length of the .22 lr is 25.40 mm. Just bend a small prototype and feel how cartridges feed.
emòtènculo
May 23rd, 2008, 02:55 AM
The base diameter of a .22 lr is 7.06 mm, so make it at least 7.2 and max. 7.3 mm inside. For the length go for about 25.60 mm to about 25.70 mm, overall length of the .22 lr is 25.40 mm. Just bend a small prototype and feel how cartridges feed.

Thank you. I'll try with these measures.