Ro-Bert, we didn't want the average soldier to do ANYTHING beyond taking the cover off, breech block and carrier out and take the piston and gas plug out. The more that they knew to take off, the more that WOULD get lost.

If I had my way, I would have cut the screwdrivers off the combination tools. The others will tell you.......... The worst offenders were the know-it-all skill-at-arms trainers. They certainly knew how to shear off foresight retaining screws and foresight blades. They also saw absolutely no need or earthly reason to keep the little 'S' shaped clicker spring under the backsight adjustment screws.

Give them a little nail and they'd have the gas cylinder retaining pin and gas cylinder off and.................... Bless 'em...., you've got to smile!