M14 Forum

M1AallTheWay

Correct, which is one reason why I don't close the bolt on it. The arbor is a snug enough fit, at least in my chambers, that while you can see the laser dot move as you turn the arbor in the chamber, once you give it a full turn (which my witness mark helps determine), it comes back to where it started.

M1AallTheWay

Tell me about it.

The AimShot will chew through batteries in well under an hour and those things aren't cheap. The trick, such as it is, is to install the batteries immediately before you're going to use the laser for a measurement and then take the bore laser out of the chamber and the batteries out of the bore laser as soon as you're done with that measurement and adjustment. It's a PIA but it doesn't need to be done very often.

D308FAM

I find the laser bore sighters to be of use AFTER I have already gotten the weapon sighted in.
After the weapon is sighted in I very carefully measure the distance to a target at - say - 10 yards and then very carefully align the sights right on a "target dot" placed on paper at that range. Then I look to where the laser boresighter is aimed on the paper and put another dot where that is at (really, I circle the lighted area on the paper where the laser is hitting).
Later, if I need to be sure that no major sight misalignment has crept in, I just hang up the "laser target" paper I made at the same distance as before, line up the weapons sights, and if there is no major misalignment I move on to other possible causes.
The whole initial process of sighting in is pretty crude so I don't think the above crude method of making sure there is no major sight misalignment after the weapon is already sighted in is any worse. And it can be done in the field...and quietly......

M1AallTheWay

That's essentially what I said in post #12 except that I do the measurement and variance recording at about 20 yds; the length of my house end to end inside. Of course, I have to borrow my wife's computer table for a bench rest but she doesn't mind since it isn't done often.

D308FAM

I apologize for my apparent repetition of what you have previously offered within this thread.
Between the two of us I hope we have gotten the main theme out there in a usuable format for the general audience....

M1AallTheWay

We did indeed. I've found the bore sighter gives a rough approximation at best for initial zeroing but can be pretty handy for confirmation when swapping things around. And it bypasses the problem of fitting a bore sighter at the muzzle when there's a FS or muzzle brake attached.