"As a former Marine, I have some experience with hand grenades, and I can assure you that every case of grenades comes with an entire booklet of warnings, written in dense legalese"
That a flat-out lie. Total fabrication. There's no "legalese" or booklet, otherwise.
An Armed Forces member is governed under martial law the second he or she swears the oath. Your Constitutional rights are suspended until you have completed your six year obligation and receive your formal discharge at that time.
People under martial law cannot sue the government which hold said law over them.
Therefore, 'legalese" booklets do not exist since there is absolutely no liability for the contractor to the service member.
This concept is spelled out early and often in the service member's career and is common knowledge to anyone who has served.
Grenades, like any other ordnance, comes in marked containers and each grenade's description (smoke, frag, etc.) and military nomenclature is printed on the individual grenade. There are no fucking "booklets,"