Homemade built to fit Sig Sauer 516, barrel nut wrench. Fits perfectly. Here is a link to buy one of our wrenches.
The local gunsmith told me they were backed up for a month. I bought a MagPul PRS for my Sig716 Patrol. I picked up a tube, buffer, and new spring from Slash's Heavy Buffers.
What tools do I need to remove the existing carbine tube and castle nut, and to install the new stock (besides...