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I WANTED TO SEE HOW DIFFERENT THE NEW HK45 WAS (VS) THE USP .45. TO MY SURPRISE "MOST" OF THE INTERNAL PARTS ARE IDENTICAL AND COMPLETELY INTER-CHANGEABLE WITH THE EXCEPTION OF A FEW PARTS. THE PICTURE BELOW SHOWS THE PARTS SIDE BY SIDE WITH THE HK45 PARTS ON TOP AND THE USP .45 ON BOTTOM. I HOPE THIS HELPS WITH SOME QUESTIONS. ...ENJOY, THANKS, BIG_CHRIS_304
 

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Kick ass post. Can I post that pic in my blog? :79:
 

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Excellent post Chris! Any chance you can post a high-res version of that pic?
Thanks
 

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The bits look like fullsize to me, especially that recoil spring assembly.
 

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Great comparison photo Chris - thanks for sharing! Nice knowing the tried and proven USP parts are for the most part still in use inside the HK45 - when its not broke, dont fix it. :D
 

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This is such a great post!!!!!!!!! I'm going to get scolded, I know, but I think it'd be cool if the individual parts could be identified...like all those small ones - to help the mechanically inept like myself understand where they go.
 

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Chris, I was looking to install a USP Match trigger kit into my HK45.

The part in which I am most concerned about is the actual trigger, with the over-travel stop.

From your observations, can you tell if the actual trigger from the USP Match trigger kit will fit into the HK45?

Any idea about the other match parts as well?

Thanks for the post, very insightful.

Also, since parts are so similar, I'd assume a USP take-down guide would be 'enough' to take down the HK45?

Thanks,
Scott
 

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Question?

I'm a bit confused, is there an O-ring barrel on the H&K45? In all I have read about it no one has mentioned it. Any info would be greatly appreciated. Thanks-Dave
 

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I'm a bit confused, is there an O-ring barrel on the H&K45? In all I have read about it no one has mentioned it. Any info would be greatly appreciated. Thanks-Dave
The USP .45 does not have the O-Ring Barrel. The new HK45, Tactical, Elite, Expert, and Mark23 all come with the O-Ring Barrel.
 
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