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The Mark 23 has a Lobos rail adapter on it, which adapts the proprietary HK rail to accept the Surefire x300 lights. it works well- the only issue is the Mark 23 is just so HUGE, that it takes some lengthy thumbs to reach it, regardless of how well it is mounted!!

The USP 9 Tactical however- that one is a special secret. I had the Streamlight TLR1 for many years, and was playing with it, trying to see if I could get it to mount to the USP proprietary rail. It looked so close, but not quite. Well i said screw it, and started carefully dremmeling metal off on the underside. Just a couple of areas, and BAM it fits the USP rail PERFECTLY!! I did a write up over on HKPRO forum about it, but lmk if you want to see pics of what i did to modify it. Not only does it work perfectly, but it puts it right in the right place to reach with your thumbs. They make an adapter similar to the Lobos for the USP as well, but it places the light too low IMO and too far forward. This modification costs nothing, and also I like that the TLR-1 has that "retro vibe" that fits the USP well!!

Link to the Lobos adapter: https://lobos-industries.com/products/low-profile-mk23-picatinny-light-adapter
Thanks a bunch for that information. I'd love to see your mod photos and/or if you have a link to your HKPRO write up.
 
Thanks a bunch for that information. I'd love to see your mod photos and/or if you have a link to your HKPRO write up.
Here you go- hopefully the pics make sense! I ended up taking more material off then i needed to. If done in the right places, when mounted to the gun you cant see the Dremel marks. Oh- you also take the 'key" out- the little plastic tab that you are supposed insert in the middle depending upon your gun pic rail. In this case, since there isnt any and it isnt needed, since as you can see the lights rail sections fit the proprietary USP rail perfectly after alteration. It is ROCK solid. Super slick!

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Here you go- hopefully the pics make sense! I ended up taking more material off then i needed to. If done in the right places, when mounted to the gun you cant see the Dremel marks. Oh- you also take the 'key" out- the little plastic tab that you are supposed insert in the middle depending upon your gun pic rail. In this case, since there isnt any and it isnt needed, since as you can see the lights rail sections fit the proprietary USP rail perfectly after alteration. It is ROCK solid. Super slick!

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Thanks for sharing, it is very clear what you did there. I wish HK would update their USP line and others that are still stuck in their proprietary world and like to see these types of creative work arounds. Well done.
 
Thanks for sharing, it is very clear what you did there. I wish HK would update their USP line and others that are still stuck in their proprietary world and like to see these types of creative work arounds. Well done.
Honestly a SLIGHTLY updated USP would sell like hotcakes- all they need to do is update the rail and then make it optics ready out of the box. Keep everything else the same -same ascetics, dimensions, everything. I know companies like Langdon now do optic cuts on USPs, which is awesome, but having them OEM from the factory means you wouldnt void your warranty. HK would be like printing money, but they just dont do it. They will argue that the HK 45 is the 'updated' USP- but it looks COMPLETELY different. And looks are EVERYTHING in the gun world. . . ;-)
 
Okay, so they improved the ergonomics while they were at it……. I like older guns and can appreciate them for what they are but the hk45 and p30 are improvements on the usp which is not as good. Nice gun, but it's been eclipsed by newer designs.
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Profit. They heckle you when you're poor and give you the German koch when you want mags.
Lol, there's an interview out there where Ken hackathorn and Larry vickers discuss the making of the hk45 and what they liked and didn't. They had a big part consulting with hk on that gun. They discuss magazines in the interview. I think that's where I heard about the magazine change anyway.
 
It's because the mags were too fat in the usp. They made a slimmer magazine so it didn't feel like a Glock. Hk is actually one of the few companies to have some compatibility among pistol magazines. Cz is another. Great idea me thinks.
I bought the CZ TacSport 2 Orange, then found out that those magazines aren't compatible with the rest of the 75 line. In all honestly though, since I'm a whore of magazines, it's probably better. Otherwise I would have probably have bought the Shadow 2 Orange.
 

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