Theohazard
Member
Just some general advice: You don't need to use a laser bore sighter on an AR, and sometimes the cheaper laser bore sighters are less effective than just sighting down the bore the way I do it.shlike said:I used a cheap laser bore-sight from Amazon prior to my first range trip just so I could adjust the iron factory sights to just be on the paper at 25 yds.
I often bore sight ARs when customers buy a new optic, and I just do it on the shop floor without a bore sighter. I take the upper off, remove the BCG and charging handle, and set it on a flat surface. I then look through the bore and find an object 25 yards away, and I make sure that object is centered when I look down the bore. Then I just zero the scope or red dot sight to that object.
This method is pretty quick and it doesn't require buying a bore sighter, some of which are fairly expensive. And it's pretty accurate too; when a customer comes back from our 25-yard range after zeroing their rifle, they've never told me that I was farther off by a few inches at max.
If you already have a laser bore sighter and it does the job, then there's nothing wrong with using it. But if you don't have a laser bore sighter, you don't need one to zero a rifle if you can look down the bore: ARs are the easiest to do with this method because the upper sits solidly on a flat surface, but this method also works with any other rifle where you can remove the bolt and visually look through the chamber into the bore. So, for example, you couldn't do this with a 10/22, but you could do it with a bolt-action rifle (though it's harder to prop up a bolt-action if you don't already have a rifle rest; AR uppers are a lot easier because they don't need to be propped up).