USPt doesn't have 20 round mags that I know of. There are Jet Funnel mags and then the 30 round 9mm mags that can hold 20 something rounds of .40. There are no official extended mags for .45.

 

I haven't heard of any high cap .45 round magazines

 

promag

yep they make one but it doesn't look good.................

ProMag Magazine HK USP 45 ACP 20-Round Steel Blue - MidwayUSA

 

yep they make one but it doesn't look good.................

ProMag Magazine HK USP 45 ACP 20-Round Steel Blue - MidwayUSA

Yes, that is what I was talking about. I may take on this project one day. There are a lot of compliants about feed errors and/or weak springs. I will post an update when I get around to this.

 

Why mess around?...go belt fed!!

 

I bought a couple of the promag 20's for the 45 tac to mess with and no bueno mang! They have failed me failed several times and now sit in a drawer of random parts. I would check into arredondo to see if they had mags or extensions.

 

I have a MK23 and a USP .45 mag, the base plate is in the way so it won't go in all the way, not sure if the 20rd mag would lock in or not.

 

only the base plates are different on the Mark and the USP. the feed lips are pretty near the same and should work ok, they did on mine
when I had some USP mags.

 

If you have money to waste (subjective term of waste) and want a RELIABLE 17-20 round Mark 23 mag, make your own. Take two 12 round mags, cut the top off one, and grind the floor plate ears off the other. Have them TIG welded together and use an STI 170 mm Universal spring. Presto, a 17-20 round mag that is as reliable as a normal Mark 23 mag. I did this very procedure with two 10 round mags after the ban ended and came up with a 17 round mag so if you use 12 round mags you should get at least 19 rounds. It sticks out stupidly far, will cost you well over $100 total, and is for those with more money than since, but it works. I did a bunch of these in USPC .40, .45, USP 45, and Mark 23 and all have worked 100%, but IMO are about as useless as tits on a boar hog. But if you MUST have one, it is an option. Pics are of USP mags but the same thing applies with Mark 23 mags.

 

This is why I love you.

 

Do the Mark 23 mags not have an option of a flat, non extended baseplate? I guess the extension might be nice for a two handed tomahawk throw when you finally run out of ammo. I love the idea of the welded mag bodies and will have to give this a dance....

 

Wow, that's kind of... amazing. Nice work!

 

Next you'll be wanting to add a foregrip. Really, just get a USC, it might weigh less then a Mk23 with a 20 round mag.

-W

 

not mine

 

Nice pair of twins you got there!

 

I have never tried it but I have heard of people fitting a para p14 mag follower and spring into their USP 45 12 round mags to get an extra 1-2 rounds.

 

Nice job on the mag extensions!

Todd

 

See? The MK23 is the world's only crew served .45 ACP automatic pistol.