[cowboy1964]

XS Sights lists only USP sights on their web site and from reading some posts apparently the rear sight doesn't fit USP Compacts.

[BuckyP]

Good question. Seems every gun the make has different sights, which in return limits after market options.


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[NEOH212]

Originally Posted by cowboy1964

XS Sights lists only USP sights on their web site and from reading some posts apparently the rear sight doesn't fit USP Compacts.

Not to my knowledge. Every sight manufacture lists separate sights for the full size and compact. I've never tried to interchange the sights from either so I don't know if they would actually fit or not.

Even of they did, I would imagine the heights would differ and your POA vs POI would be drastically different.

[coleslaw]

Originally Posted by cowboy1964

XS Sights lists only USP sights on their web site and from reading some posts apparently the rear sight doesn't fit USP Compacts.

The USP compact and USP full size sights are the same exact sites. I installed a set on my USPc and spoke to a rep from the company because I was concerned about half of the tritium vial being covered by the slide and the rep said that the USPc and USP full size sights are the same.

[NEOH212]

Originally Posted by coleslaw

The USP compact and USP full size sights are the same exact sites. I installed a set on my USPc and spoke to a rep from the company because I was concerned about half of the tritium vial being covered by the slide and the rep said that the USPc and USP full size sights are the same.

Dimensionally they are the same and will fit the slide but the height is different between the compacts and full size. That's why the sight manufactures list different part numbers for the compacts.

As your rep said, the sights will fit into the dovetail of either size pistol so he was correct in that statement.

However, point of aim vs point of impact will be off if the wrong set of sights is installed on the wrong gun.

That's the voice of experience talking! Been there done that!

[BuckyP]

Originally Posted by NEOH212

Dimensionally they are the same and will fit the slide but the height is different between the compacts and full size. That's why the sight manufactures list different part numbers for the compacts.

As your rep said, the sights will fit into the dovetail of either size pistol so he was correct in that statement.

However, point of aim vs point of impact will be off if the wrong set of sights is installed on the wrong gun.

That's the voice of experience talking! Been there done that!

Hmm, that is good info to know. I am desperately trying to change my USPc's point of aim, about 6" up. Have to look into the USP's sight heights and do a little math.

[barth]

Originally Posted by NEOH212

Dimensionally they are the same and will fit the slide but the height is different between the compacts and full size. That's why the sight manufactures list different part numbers for the compacts.

As your rep said, the sights will fit into the dovetail of either size pistol so he was correct in that statement.

However, point of aim vs point of impact will be off if the wrong set of sights is installed on the wrong gun.

That's the voice of experience talking! Been there done that!

+1.
I keep reading about POA issues with after market sights.
And can't help but wonder if folks aren't using the exact right sights for that specific model.

I've had XS Big Dots installed on my Sig P220, Sig P239 and Glock G27.
All perfect POA.

Having them installed on my new HK P30 40 LEM as we speak.
If XS lists different sights for different models - there's a reason.

[BuckyP]

Originally Posted by BuckyP

Hmm, that is good info to know. I am desperately trying to change my USPc's point of aim, about 6" up. Have to look into the USP's sight heights and do a little math.

Looking at the manual, the USP has even taller sight options for the front sight, which is the opposite of what I'm looking for. Can anyone tell me the rear sight height of a USP (fingers crossed that it's taller than a USPc).

[NEOH212]

Originally Posted by BuckyP

Looking at the manual, the USP has even taller sight options for the front sight, which is the opposite of what I'm looking for. Can anyone tell me the rear sight height of a USP (fingers crossed that it's taller than a USPc).

What sight picture are you wanting to use? This may help us to figure out what sights you may want.

[BuckyP]

Originally Posted by NEOH212

What sight picture are you wanting to use? This may help us to figure out what sights you may want.

Bullet to impact directly above the front post. I know HK doesn't set the point of impact in that manner, which is why my groups are so low. And being this is how most my other guns shoot, I don't want to change my shooting method.

I'm looking to raise the point of impact 6" at 25 yards, so I need a smaller front or taller rear, or combination of both depending on what's available. According to the manual, factory is 6.2mm and they offer a 6.0mm as the lowest (though all sorts of taller options ).

My hope is the USP rear sight is taller, and the dovetail cut is the same (as some here have already confirmed it is). If I get some time next week, I'll give Trijicon a call and see if I can get some numbers from them. They already provided men numbers for their sights on the USPc. Had I known at the time that the USP was the same cut, I would have asked for those numbers as well.

[kemet1953]

They are the same sights. I installed sights from a USP 45 on a USP 40 compact and it works.

[coleslaw]

Originally Posted by NEOH212

Dimensionally they are the same and will fit the slide but the height is different between the compacts and full size. That's why the sight manufactures list different part numbers for the compacts.

As your rep said, the sights will fit into the dovetail of either size pistol so he was correct in that statement.

However, point of aim vs point of impact will be off if the wrong set of sights is installed on the wrong gun.

That's the voice of experience talking! Been there done that!

Yea, I got the compact XS sights (which are also listed as the full size USP sights) from Adam @ HKparts.net and my rear sight still sat low in the dovetail. I know that XS offers two different heights for the front dot but not the rear sight. If you know of a rear XS tritium sight that will fit and give a normal sight picture (comparitive to other sight pictures on other guns) then please let me know because I was told that that's just the way the rear sight sits in the USP and USPc.

[NEOH212]

I would venture to say that you will have to end up getting a spare set of sights and a file. Work the sights with a file to obtain the sight height that gives you what you want and then try to find a set of sights that match your dimensions.

Or, use the sight correction calculator:

http://www.brownells.com/.aspx/lid=1...ion-Calculator

Or, try to find a set of adjustable sights that fit your gun.

I hope this helps.

[BuckyP]

I've considered the file option. However, that would work out strangely with the "dots", as they wouldn't line up. I would need either a single dot rear, or blank rear.

Unfortunately, the other option is to let them sit in the safe, and shoot / carry all the other guns that shoot where expected.

I find it strange that few people comment on this issue (though I'm told this is less pronounced in the newer models - P30, HK45). Maybe I'm

[tslater]

I had the very same issue w/ a 45c. Gun shot way too low for me. I changed the front site to a 6.1 replacing the 6.3. Good to go now. I'd say go for the 6.0 front.