I've used a little 600 grit sandpaper just rubbed by my finger on the inside of my last 2 lo pros from YHM. Dremel might be overkill, it doesn't take much to get it on there.
Next time you go to the range make some money. Just catch or retrieve your 6.8 brass and sell it.
"Life's tough, it's even tougher if your stupid" John Wayne
Put your barrel in the freezer and heat up the gas block over the stove. I didn't actually have to freeze my barrel, but that is an additional measure. It slid right on.
Easiest method is to get some 400 to 250 grit paper, wrap it around a dowel in a hand drill so that it fits snug in the block and run it for a moment or two. You can remove a half thou at a time this way. Keep taking a smidge off and trying it. When the gas block slides on you're done. Everyone but PRI makes their blocks slightly under size.
1. I can't make my barrels any smaller in diameter as they are spec'd for Ops Inc silencers which require tight tolerances on the barrel dimensions
2. I sell in bare stainless, bead blasted, and coated, so I can't bring the dimensions down to make up for coating as not all barrels are sold this way.
So, long and short is that low pro gas blocks are a pain to install, except for PRI, but then the PRI gas blocks are usually too tight for the gas tube, argh!
When I go to bed as a law abiding citizen and wake a felon, by nothing more than the stroke of the legislative pen, tyranny has arrived.
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