AR Sponsor
Posted: 8/11/2011 10:38:06 AM EDT
|
Does anyone have the dimension of the height of the 25-round magazine so that a replica can be cobbled up?
|
|
Quoted: Does anyone have the dimension of the height of the 25-round magazine so that a replica can be cobbled up? http://www.ar15.com/forums/topic.html?b=3&f=123&t=503479 - also on www.retroblackrifle.com |
|
Retro black rifle
Go to "Build Guide" at the top.. Then select "25 round magazine" |
|
Quoted:
Does anyone have the dimension of the height of the 25-round magazine so that a replica can be cobbled up? It's...That much longer... 
It doesn't need 'cobbling'...A length of rectangular steel tubing can be machined to the required dimensions...and a 30 rd spring cut down to push a regular follower (or an aluminum one) and a nice period baseplate installed... 
...You'll also want to 'cobble' a mandrel to peen the feed lips... 
Then just start cranking them out!!! 
|
|
Quoted:
Quoted:
Does anyone have the dimension of the height of the 25-round magazine so that a replica can be cobbled up? It's...That much longer... VERY Nicely done sir! I spewed Dr. Pepper all over the compooter screen. Thanks for the input and information, gentlemen. |
|
Quoted:
Hint: If you build it they will come and buy it! Hint: If you have a CNC workstation, it's a piece of cake!
All the machining is on the outside of the tube; I used steel because there was no aluminum rectangular tubing of the correct dimensions. I did a writeup of these (I made two; one for each of my prototype clones) a couple years back. There may be aluminum available now. I only have manual mill capability; quite slow. My two are done & complete; work at least as well as the originals (make one and you'll see why the 30 rd'ers are curved!). They need Parkerizing but the last time I brewed up a solution [Uzi receiver & barrel], there wasn't enough room for the mags... 
Here's a composite pic of the mag, shown with a section of tubing (partially machined)... 
Here's the other side of the mag, with the bending mandrels and fillers... 
|
|
Quoted:
All the machining is on the outside of the tube; I used steel because there was no aluminum rectangular tubing of the correct dimensions. I did a writeup of these (I made two; one for each of my prototype clones) a couple years back. There may be aluminum available now. Would any of the sizes available here be suitable? |
|
Nope. Same sizes as when I searched. If they had 2 ½" x 1" x 1/8" wall it might work...but the aluminum rectangular tubing typically has a larger corner radius [inside] than steel...which would interfere with the cartridge base... 
|
|
I bet you could make that one work!
|
|
Quoted:
Postino what EM are you using to make those cuts? Are you doing one pass or several small ones? They look great, must be a long lunch break to crank one out Corner rounding end mills; radiused end mills; ball end mills, center cutting end mills... 
Several small cuts...I don't have the HP for a 3" diameter end mill...
All done in my basement...On Sundays, mostly...(Only day I have off)...
|
|
Andouille -
I'm sorry for 'hijacking' your thread.
My intent was to show (and perhaps inspire) that things like magazines, front sight bases, bayonet grips, XM607 fixed stocks etc can be fabricated by home builders, without having to go to a million-dollar CNC workstation. The workstation is easier for production, but if all you want is one or two, then Grizzly/Harbor Freight/Travers/whatever have affordable tools to do-it-yourself. It just takes time...and money...
There's probably a BOCES or Adult Education Center at your local college (or prison) that can teach you the fundamentals for very little. I attended one such back in the 80's while getting credits for my Millwright Apprenticeship. 3 or 4 nights a week for 3 or 4 months. Well worth looking into. And my instructors were very helpful about my bringing in outside work and doing some on-the-job learning...
|
|
Quoted:
Quoted:
Postino what EM are you using to make those cuts? Are you doing one pass or several small ones? They look great, must be a long lunch break to crank one out Corner rounding end mills; radiused end mills; ball end mills, center cutting end mills...
Several small cuts...I don't have the HP for a 3" diameter end mill...
All done in my basement...On Sundays, mostly...(Only day I have off)... That's a lotta end mills, no wonder your exhausted. Are you doing this on a press with a machinists vice or your own personal Mill? I love the mandrels, nothing store bought about those. What was your total time to crank one out start to finish? |
|
Quoted:
Andouille - I'm sorry for 'hijacking' your thread.
My intent was to show (and perhaps inspire) that things like magazines, front sight bases, bayonet grips, XM607 fixed stocks etc can be fabricated by home builders, without having to go to a million-dollar CNC workstation. The workstation is easier for production, but if all you want is one or two, then Grizzly/Harbor Freight/Travers/whatever have affordable tools to do-it-yourself. It just takes time...and money...
There's probably a BOCES or Adult Education Center at your local college (or prison) that can teach you the fundamentals for very little. I attended one such back in the 80's while getting credits for my Millwright Apprenticeship. 3 or 4 nights a week for 3 or 4 months. Well worth looking into. And my instructors were very helpful about my bringing in outside work and doing some on-the-job learning... Postino, no offense taken, I see no hijack nor intent to hijack. It's quite infomative. The thread has obviously become very interesting to lots of folks. My problem with projects such as this is time management. I gots me no spare time to manange. I'm out of town most all the time these days, and it's literally impossible for me to find time to learn how to run mills or cast small stuff from resin or much else. I understand that doing this stuff is stupid simple to some folks, but we all gotta start someplace, and right now, I got no time to get started. Some learning experiences are gonna have to wait for retirement before I get time to take them on. |
|
Quoted:
I gots me no spare time to manange...Some learning experiences are gonna have to wait for retirement before I get time to take them on. Same here...I'm at work or driving to it 12 hours a day...Dogs need time, too...and now they want me to work 6 days...
I don't do this stuff to make $$$...Just as a hobby...If it interests me, I'll give it a go...If it starts being 'work', I'll go on to something else...
|
AR Sponsor