I don't have a ton of guns with m-lok, or a ton of guns period. I have 2 guns with m-lok mounts, and neither of them maintain zero with a laser sight I got. The sight might be garbage and probably is, but this experience has made me wonder if it could ever work at all, regardless of the sight quality. Are picatinny sights the only serious sight/scope mounts, and m-lok is too loose for this use case? Does this have to do with the assembly of the gun? If so, are there some m-lok mounts out there somewhere that are as solid and immovable as picatinny?

I had to look this up. Two bills for a notch and post set up.

Like with archery, frequent practice makes the weapon an extension of the body such that we point the entire system at the target. If we have them, we refine our aim with the sights. In a close range self defense situation, we'd best have practiced at pointing the system at the threat rather than refining minutes of angle upon a target far away.

CDF

I wouldn’t think the m-loc system is to blame, perhaps the quality of the sight. Don’t have one, but post some pics of the setup.

I got an M gizmo for a bipod mount, works well enough and pretty sturdy. With sights, I think the less bits that hold the things in place, the better.

CDF has the fight idea, spend the coin on the bits that go bang.

I have oodles of stuff mounted to the M-LOK slots on my precision rifle chassis and they seem to work fine. If the zero is changing then something is moving. I am constantly amazed and screws that get loose from recoil. I'd check that first. M-LOK works great for me.....

VooDoo

I've have m-ok sights on my AR-15. I can't say I've used that gun much, but they seem fine to me.