Ar 15 upper receiver tools

Place the lower receiver magazine well onto the mag block for working on your lower receiver on a bench vice.

You may then work on your trigger group, bolt catch assembly, buffer tube, stock, and receiver pins in this position. The mag block can also be inserted through the top of the lower receiver, if you do not have the bolt catch installed. You can then mount the lower receiver upside down on a vice. You may then work on your pistol grip, trigger guard, buffer tube, and stock in this position. What I have found from my experience comparing hand lapped uppers to those I have had trued up on a lathe, is that one way is as good as the other at truing up the face of the receiver.

IMO those telling you the hand lapping will hurt you is them trying to sell you their services based more on them wanting to get your money than any real facts or evidence. Also, I have seen repeatedly that both hand lapping and lathe truing will almost assure you have sights zero in near the center of their adjustment range but in neither method have I seen even a tiny improvement in accuracy.

But of those I did accuracy testing both before and after truing, I saw zero change in accuracy. I also have not seen any longevity increase because I have never worn out any bolt, carrier, barrel extension or anything else with either method of truing.

For me, sights zeroing near their center range of adjustment is enough reason alone for me to continue lapping my uppers. Think I'll take that apart and true it to see if it helps. It also came with a flexible driver which I thought was cool. Quoted: Make sure your FSB isn't canted. That was a thing for a little while apparently. View Quote View All Quotes. Any way of correcting it myself or send it back? Having not done one , I believe you'd be better served and minimize error if using either a cutter or lapping tool, if the procedure was performed vertically and let gravity do it's thing.

Quoted: Having not done one , I believe you'd be better served and minimize error if using either a cutter or lapping tool, if the procedure was performed vertically and let gravity do it's thing. Paladin Machine Shop. Do it right or dont do it at all. Quoted: having done many, if you're going to rely on gravity, it's going to be a while. Quoted: Paladin Machine Shop. Xcaliber has their BART 2. If the journal surface does come into contact with lapping compound, then when you push it back in to resume lapping, you end up with swirl marks in your receiver bore.

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