The KRISS Mag-Ex Kit 2 is the ultimate capacity extending base plate for your factory standard Glock magazines. The KRISS Mag-Ex Kit 2 is made up of the extended baseplate, outer sleeve, and extended spring, constructed of durable and lightweight reinforced composites. Combining the Mag-Ex Kit 2 with the factory standard Glock magazine body and follower is a perfect match of reliable feeding, toughness, and aesthetics for the KRISS Vector. The Mag-Ex Kit 2 is available in 9mm, 10mm, and .45ACP and designed for standard capacity G17, G20, and G21 magazines for an overall capacity of 40 rounds of 9mm, 33 rounds of 10mm, and 30 rounds of .45ACP for your KRISS Vector, Glock handgun, and your Glock magazine-compatible pistol caliber carbine.
Due to spring tension, hand-loading ammunition into extended capacity magazines becomes increasingly difficult the more you load. We highly recommend the use of a magazine loader such as the UpLULA.
Please Note: You are responsible to know and comply with your state and local magazine capacity laws. A 4% administrative fee will be applied to orders that must be cancelled.
This item cannot be shipped to states with magazine capacity restrictions.
This includes, but is not limited to, California, Colorado, Connecticut, Hawaii, Maryland, Massachusetts, New Jersey, New York, Washington D.C., and Vermont.
|9mm Kit||G17 17rd|
|10mm Kit||G20/G40 15rd|
|.45ACP Kit||G21 13rd|
Note: Mag-Ex2 Kit is designed for factory GLOCK full size, standard capacity magazines of the correct model. We do not guarantee fit nor function when using aftermarket magazines or incorrect magazine models. Incompatible with reduced capacity 10rd magazines.
8 Reviews Hide Reviews Show Reviews
The mag extension is nice for added ammo capacity. But if you drop it empty it pops apart and parts go everywhere. Needs some sort of locking mechanism.
This is the only 10mm mag extension I’ve bought that works.
1) Use Glock magazine tool to disassemble stock G20 magazine.
2)Reassemble mag using MAG-EX2 10mm Extension Kit; brief, concise, to the point visual instructions included with each kit.; function check each.
3) Safety check; load up 397 rounds of full power Buffalo Bore tactical frangible ammo; not one FTF out of the lot.
4) Use flat head screw drivers X2 to easily disassemble each unit; wider the better for the flat heads; units are sturdy enough to handle disassemblty with no bulging or damage whatsoever using this method.
5) Repeat steps 1-4 as needed.
I know many have been waiting for these, and boy do I have to say it was worth the wait. The magazines are simple to install, if you have the technical skills to disassemble your glock magazines properly. 33 rds of 10mm is something that any 10mm user would appreciate. I'm deciding on how many 9mm kits I want now to go with my 9mm firearms.
My advice to anyone having issues with their magazines, is to follow the instructions as written. If you follow the instructions verbatim, your magazines will work just fine!
Like many, I have been waiting for someone, anyone, to come up with a higher capacity solution for my 10mm Vector, and I couldn't be happier with these extension kits.
They are great quality kits, they are easy to install, and all of mine function and feed perfectly. Quick note on the installation, the instructions provided are great, but they don't illustrate how to take apart the original Glock mag, and to say the tabs at the bottom are a PITA is a real understatement. It's easy to damage the mag body if you don't use a vice. I see some other reviewers having feeding concerns, I'm willing to bet the Glock mag body was bent a bit during disassembly.
I purchased 6 of these and installed them on 6 brand new G4 Glock 20 magazines. As one other reviewer noticed, when unloading with my thumb on a couple of them the last 2-3 rounds wound get hung up around the 23-24 round mark allowing all the rounds above them to fall out. I was immediately concerned and debated returning them.
However, once I took them all to the range I NEVER experienced stuck rounds! I believe the recoil of firing the 10mm provides enough of a jolt to keep everything feeding properly. (which is hard to replicate unloading by hand). I tested them in a Glock G4 20, G3 29, G4 40 and a Glock G3 20 in a KPOS Pathfinder. No issues at all!