modifying handgun magazine for different release


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Clark
December 23, 2007, 12:09 PM
Right now surplus Beretta 92S pistols are coming into the country and are available at a deep discount.
They will not take standard 92FS mags, and the mag release is on the bottom rear of the frame, not under the trigger guard.
http://www.berettaweb.com/92%20Successo/92/92s-sx-1-p-beretta.gif

While most Beretta 92 pistols have the mag release on trigger guard.
http://www.berettaweb.com/92%20Combat/92-sauron-combat.gif

http://en.wikipedia.org/wiki/Beretta_92
92S

In order to meet requirements of some law enforcement agencies, Beretta modified the Beretta 92 by adding a slide-mounted combined safety and decocking lever, replacing the frame mounted manual thumb safety. This resulted in the 92S which was adopted by several Italian law enforcement and military units. The later relocation of the magazine release button means these models (92 & 92S) cannot necessarily use later magazines, unless they have notches in both areas.

But one can find 18 round Mec-Gar mags at a reasonable price
http://www.wholesalehunter.com/product.asp?productid=46024

So I took a Beretta 92S mag and and used it to set up a fixture to modify four of the Me-Gar 18 round mags.
http://www.use-enco.com/CGI/INSRIT?PMAKA=209-9006
The clamp on the mill vise cost $6 and positions the Mec-Gar to be cut where the Beretta 92S mag was when I put the 1/4" bit in the slot.
http://www.use-enco.com/ProductImages/0950635-11.jpg

I found that the magazine bodies were hardened, and I had to make the cut with a carbide end mill.
The Beretta 92S mag slot was ~.260", and a 1/4" end mill does a decent job of making the slot in one pass.
The original mags have a steel bottom plate, while the Mec-Gar have a plastic bottom. When the Mec-Gars have the bottom installed, I have to punch the bottom of the mag to get it to catch in a 92S handgun. I think the plastic is springy and interfering, but may keep the gun from rattling.
Once set up, I can disassemble a mag, cut it, and reassemble in 5 minutes.

1) pic is the 92S mag in the mill vise, butted up to the clamp, and the bed adjusted until the bit is just kissing the radius of the factory slot.
2) pic is the Mec-Gar aftermarket 18 round mag then put in the vise, butted up to the clamp, and milled out the same depth as the factory mag. A carbide bit seems to attract the chips like a magnet.
3) pic is the factory and the modified mag side by side.
4) pic is the factory and the modified mag side by side

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BBBBill
December 23, 2007, 09:08 PM
Nice job. For several years, the factory mags came cut for either style mag catch. I've modded beretta mags to work in other guns when the ban was on.
where are you seeing the 92S for sale cheap?

Clark
December 24, 2007, 12:40 AM
wholesale prices are a secret with some importers/distributors/ wholesalers.
Know what I mean? nudge nudge wink wink

Dave Baird
December 26, 2007, 06:58 PM
Cheap? Where please? Wow!

Clark
December 27, 2007, 07:20 PM
Here is what one looks like with an 18 round Mec-Gar magazine modified and installed.

TEDDY
December 30, 2007, 08:06 PM
you can also modify bret mags to HIPower by cutting slot in mag at right spot.
:uhoh::confused::neener:

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