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View Full Version : High capacity double-stack magazine conversion for Glock .45's. Kriss G30!



wyntrout
11-01-2014, 11:21 AM
Well, I finally found an answer to the quest for a working... reliable... high capacity magazine for the Glock .45, including my G21 SF and G21 SF-based Mech Tech Carbine Conversion. I had heard that the Kriss SMG mags and the conversion kits worked. I finally got some to test and was really pleased.

I searched online and watched several videos demonstrating the conversion using a 13-round G21 magazine... pretty easy.

I made one slight alteration to the baseplate of the magazine... very slightly smoothed the leading edge of rail to ease sliding over the locking tabs on the base of the conversion. It was really hard to get the baseplate on and rounding the leading edge of that rail made it easier. It might be a b!tch to get off, though. One could slightly round the tabs on both sides on the base of the conversion, but that's up to you. It would make un-doing the conversion much easier.

I found that cutting a couple of pieces of thick, insulated copper wire to lay on top of the two tabs on the sides to remove the springs or service the mag, which eased depressing those tabs. You can't do both sides with your fingers at the same time... well, maybe MOST of us can't! :D

The conversion process was easy. Disassemble the G21 magazine and put aside the spring and locking plate from the base. The G21 mag tube is inserted fully into the upper part of the G30 tube. Then the follower and spring are inserted up that part of the tube before inserting the bottom half of the conversion and snapping it into place. Then the baseplate is slid into place. Be careful of orientation when assembling the follower and the halves of the G30. As with the Kahr mags, the free end of the spring goes to the front of the follower for the most lift.

After assembly I was able to load 30 rounds into the first mag. The second mag would only take 28 with the first try. I unloaded it and managed to get 29 in the next time. I fired the first mag full once. The second I fired 3 or 4 mags full and alternated between 28 and 29 rounds before it was "full".

I had only one failure to feed and that might have been a premature slide lockback, but otherwise, I had no problems at all. I recommend the Mag UPLULA for any magazine loading! The G30 is more of a fit than the Korean high capacity mags and certainly works better. This is what is used for the Kriss SMG!

Insertion of the magazine into the pistol is best done with the slide locked back as there is a LOT of pressure on the top round from the compressed spring. It takes a lot of pressure to insert the G30 with the slide in battery!

I like this conversion and bought 4 for myself. I just ordered a bunch of those and some more G21 mags for sale at the gun shows.

For a really good deal and free shipping over $49, try this link and soon. It had the best price and fast, free shipping using Priority Mail. The first order did not give me any shipping info, but I received the package Wednesday after ordering on Monday... very fast. I did get tracking info this time after talking to a lady at Cope's Distributing.

http://www.copesdistributing.com/fall-clearance-sale-kriss-45acp-17rd-p-6461.html

Here's the home page with the free shipping offer:

http://www.copesdistributing.com/

Now some pictures.

Wynn :)

wyntrout
11-01-2014, 11:29 AM
A few more pictures follow. This conversion was easy to handle and the magazine was easy to handle, as was the pistol with the mag inserted.

The new 25-yard range where I shoot should be finished and I guess that I'll wind up keeping this carbine when I can shoot it there. The G30 mags really make me feel better about the reliability of this combo... especially for defense!

Wynn :)

gb6491
11-01-2014, 11:57 AM
Interesting post Wynn, written with your usual thoroughness. I enjoyed reading it.
Thanks for the time and effort involved.
Regards,
Greg

wyntrout
11-01-2014, 12:19 PM
Thanks, Greg.

I would have posted some shots of me firing the G21 with the G30 mag, but the angle of the camera just showed my arm in the way. My first few shots I yanked the pistol to the right and then I slowed down and it was normal shooting for me. I look forward to the new range around the end of the year and trying out that carbine.

Oh, the price at Cope's was $25.99 per conversion kit. Online the "normal" price was $36.95 or even higher. Completed conversions ranged from about $58 to$70 or more, plus shipping!

Wynn :)

muggsy
11-01-2014, 01:11 PM
Geez, doesn't lend well to concealed carry now, does it. If you carried your Glock where I carry my CM9 everyone would think that you were walking around with an erection, or as in my case a resurrection. :)

wyntrout
11-01-2014, 01:13 PM
:) These will do nicely for home defense or for use in my carbine!

Wynn :)

wyntrout
11-20-2014, 10:55 PM
These appear to be manufactured by Magpul. There's a Magpul Design stamp on one of the larger parts.

I hope I can sell all of these additions to my inventory at the gun show this weekend! I need to pay off the credit card used for their purchase!

I assembled 5 kits with new G21 mags for resale... taking 10 to 15 minutes each, including loading and emptying each with 30 rounds using my Mag UPLULA... recommended!

Gun Show this weekend at the Prime Osborn Convention Center Saturday and Sunday... 22 & 23 November... Jacksonville, FL.

Wynn :)