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HK USP detail strip?
Does an HK USP need to be detail stripped for proper maintenance, and if so, what is the round count interval for detail stripping it? Thanks.
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Suppose ammo quality may play a factor, but I have several USP's. Two of which I've shot the piss out of. I tore my frame apart on one after around 6k rounds and it wasn't bad at all. Me personally, I wouldn't worry about it till around the 10-15k mark. I've got a buddy who has at least 15k rounds on his USP and it's still functioning flawlessly having never done a total tear down.
Just do the basic field strip every 500 rounds or so and keep rockin. I have an armorer's manual and I didn't see it directly address as to when to do a total tear down. It mentions something to the effect of, during testing USP's routinely fired 10k without malfunctions. Implying somewhere after that point is when you may want to.
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Thanks for the info El Vaquero.
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I changed out the trigger/hammer parts for a LEM on a used USP 45. It wasn't too bad dirty in there but I'm not sure gun scrubber wasn't used before it went to the shop.
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The only times I have detail stripped mine were when I was installing the LEM trigger parts. Other than that, I have not seen a reason for a total strip of the frame. HK makes a very durable pistol, and many shooters will never even need to replace a recoil spring.
Bear in mind, there are some parts that are a royal pain to put back, like the trigger return spring. If I were to strip the pistol, I would probably just do the back half of the frame, where the hammer axle and sear reside, and leave the trigger in place.
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I've put thousands of rds. through a USP Tac .45 and.45c including multiple classes. Never thoroughly stripped either. Nary an issue. Lube is the key.
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Check the owners' manual. I believe the first maintenance interval for the USP (45 anyway) is the guide-rod spring at 25k rounds.
No, really...
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My opinion is that you're unlikely to shoot it enough for that to be required. I've never detail stripped any of mine. I wouldn't sweat it.
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Just field strip it to clean and lubricate it. If it starts to have a reliability problem, just send it to H&K and they'll cover it under warranty (assuming it's not a police surplus). My '93 USP40 has had the recoil spring and a sight insert replaced under warranty.
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I'd forego a detail strip until ~ 20K rounds, at which point I'd go in and replace the sear spring. Its the only part I've broken on an HK.
I find it easier to detail strip a polymer HK than it is to replace the trigger return spring in these guns.
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