All this got me thinking, and I looked on Amazon to see what was out there now. They sell a Wheeler laser that mounts on the muzzle with a strong magnet like some collimaters do. It’s here now, and I’ll give it a try when the rail for my new pumpgun gets here. Meanwhile, I’ll try it out with a couple that are already dialed in to see how close it comes.
The instructions say that the alignment on the muzzle isn't critical, as the error will be the same at 25 yards, assuming a square muzzle. Need to put some tape on the magnet to prevent scratching the surface on shotgun barrels I think.
