22 years, all I ever saw used was a 10 penny nail to adjust the sights. Jacking around with magazines and popping out rounds to booger up is considered a safety violation. You get loaded mags, and you don't do anything with them but load them one at a time when told. The Safety NCO's on the line enforce it.
Accessories are a major firearms industry - which should be balanced by noting most are NOT used by any Army in the field. Muzzle dust covers and a cleaning kit are about it, the Marines use the Norgon ambi control, and a decent optic are all you need. Expensive CQB combat slings - well, the Infantry School had us take off the "silent" sling any time we were in a field exercise, you keep your rifle at the ready, don't hang up on vehicles, brush, or whatever, and it stays quieter. Nice to have one walking out of a deerstand after hours, you aren't "hunting" slung up, but you might be tired.
Most of the rest of the tools, not so much, I assembled mine with vice grips and used drill bits, the barrel nut tightened with a set of vice jaw covers and 18" channel lock pliers. Most of the armorer's kit is used to disassemble the machine guns in a unit, not assemble an M16.
Anything not issued on an M16A4 or M4, I seriously question until I understand what it can really do. And, I expect it to cost 10X the issue part, which means it likely isn't good value for the money.
