anothergun,
The Sightmark laser models only cost around $20, depending on where you buy them. But they're essentially chamber-specific cases that only fit a rifle chambered for the .223 Remington, .243 Winchester, etc. If you want to use a collimator for rifles in several chamberings, you're money ahead when buying a more universal model, whether a laser or optical type.
Thanks John...
I have a bushnell with the plastic insert on the end of the unit, for different calibers, and they seem to be touchy, and have to be set in the barrel just so, in order for the laser to be where it needs to be.
So the ones that look like a casing seem that they aren't as finiky?
