View Full Version : Adjusting rear sight on HK-91, PTR-91, Vector V-51

Got Stuff?
03-04-2007, 11:28 AM
Specifically, I have a Vector V-51 model. Currently my rear site is set on the v-notch. How do I get the thing to turn to the 100, 200 and 300yd peep hole settings? Also, how do you adjust the elevation? I tried a quick search for a rear sight adjustment tool but no luck.

Are there any folks here that have a V-51? Vector does some major mods to make these PTR's into the pistol version and I was wondering about getting replacement parts if needed (IE bolts and recoil springs).


03-04-2007, 11:38 AM
you should be able to spin the drum simply by hand. if you remove the rear sight, there is a spring that holds a ball bearing under the sight drum. for some reason on my v93 the was really tight/ and damaged. elevation is done with a special hk tool - though I can remember someone talking about a hemostat? Ideally the elevation is already correct :)

Vector sent a new one but it still was not a slick as on a PTR, so I clipped the spring a little (one coil?) and that helped the pressure on the ball bearing which in turn allowed me to hand turn the drum...

as far as turning your V51 into a pistol - i think that is illegal!! I am sure other board members can chime in on that.

Got Stuff?
03-04-2007, 12:12 PM

Thats it! It turns by hand. It's just that the detents really hold it in place, which is a good thing. I doubt that I'll need to adjust elevation. I havn't set it up on a bench and really checked to see if it was perfect. Me and a few buddies usually go to the mountains and shoot about twice a month but it's usually not optimal conditions to be sighting in a rifle.

The rifle is actually the V-51 "rifle" version of the pistol. Vector welded an extention on the 8" barrel to bring it out to 16". There's some pics over at http://www.vectorarms.com


03-04-2007, 12:36 PM

Got Stuff?
03-04-2007, 4:09 PM
Thanks for the info!

Now, where can I get a rear sight tool if I happen to need one?

03-04-2007, 6:01 PM
you could make one ;) it's just 2 prongs.

or try




call vector or robert they both have more stuff in stock not listed on their site.

03-04-2007, 11:24 PM
+1 for Robert RTG

Gordon Miller http://www.hkspecialist.net or Adam Webber http://www.hkparts.net should have the sight tools. I have dealt with both before, if they dont have it, they can get it for you.