Laser does not hold zero

[Ginster6]

Yesterday was my first time using the laser on both of my handgun
I have viridian C5L. On Sig p229. And lasermax UNI on HK VP9.

After couple of shoot it did not hold zero.
I feel it not the laser has shifted. But the unit itself has move on the rail.
Would you say it not tight enough or is this normal?

[osis32]

not tight enough. it probably has a torque specification that you need to tighten to. if it moves the point of aim will not be rotatable.

[TKM]

The HK has a polymer frame. It will flex.

The Sig should have an alloy frame so it's probably a problem with the mount.

[HKRick]

I used to work for Laser Devices but I'm not familiar with the lasers you are using specifically. Usually when a laser didn't hold zero it was 1 of 3 issues.

1) Mount wasn't tightened correctly
2) Diode set screw not tightened (not all lasers have a third screw, Windage, Elevation and SET Screw)
3) Stripped W, E or Set screw.

[tbc]

Laser does not hold zero

How did you test your lasers?

[Ginster6]

How did you test your lasers?

I bore sited using site lite SL100. My Red dot were perfect on my rifles.

[Ginster6]

I used to work for Laser Devices but I'm not familiar with the lasers you are using specifically. Usually when a laser didn't hold zero it was 1 of 3 issues.

1) Mount wasn't tightened correctly
2) Diode set screw not tightened (not all lasers have a third screw, Windage, Elevation and SET Screw)
3) Stripped W, E or Set screw.

Those were new laser. Maybe u right about tightening it more.

[FeuerFrei]

Barring any mechanical lissues you might consider the trigger finger is askew.

Dry firing with a laser sight reveals a lot about trigger control, follow through etc..

Just keep an open mind about that.

Sent using 2 cans and a long string.

[Blade Gunner]

Get an in-bore sight laser (sightmark). Remember a laser sits beneath your bore and past the point of intersection. If you set your laser at 10 yards, past that point you will continue to hit lower. Changing a laser from one gun to another requires re-zero. Viridian make good lasers, unlike cheap lasers with poor housings and adjustment screws. If its set tight on the pic rail, you should not have a wandering zero.

[Ginster6]

Get an in-bore sight laser (sightmark). Remember a laser sits beneath your bore and past the point of intersection. If you set your laser at 10 yards, past that point you will continue to hit lower. Changing a laser from one gun to another requires re-zero. Viridian make good lasers, unlike cheap lasers with poor housings and adjustment screws. If its set tight on the pic rail, you should not have a wandering zero.

I am using SiteLite SL-100 bore site

[santacruzgunner]

Get rid of it and use your sights

[Ginster6]

ok. I found my problem. such a idiot..

. it was loose. it had another 4-6 rotation of tightening.

[osis32]

told you