I asked and below, straight from the horses mouth...
First, gas tubes only wear out when they are slightly misaligned. They generally do not wear out before the barrel and often do not wear out at all if they are straight gas tubes which are inherently aligned. It is still a good practice to replace the gas tube when replacing a shot out barrel.
You can replace a straight gas tube without removing the gas block on this system.
Third, the notion that the grub screws must be replaced is ridiculous. They should only be replaced if lost or physically damaged. Otherwise, they work just fine.
IUR/MRR Wrench Project Update
Well, our machine shop just brought us a sample this afternoon.
I love the TIG Weld, its a work of art. I told him not to machine it out. Just too nice not to have on this piece.
Same dimensions as the original Colt Canada wrench, but we opted to use a 4140 chromoly steel for the bit to give it longer service life.
The original tool is not quite as hard as this.
A work of art and made one at a time with love here in Canada.
Its now gone back for a few more tweaks before we start the first production run this week. For a finish, we may Cerakote them.
Enjoy the photos... (of course the black one is the original tool, our's is unfinished)
Looks great even unfinished. If it keeps cost down, I'd leave it as is.
That's a buy!
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