those are cool ideas, but i think these would be cool also
(LMG specific)Copper: gun made of copper with tube(similar to a light bulb), that has electricity running through it.unlocked from getting 5 triple kill medals
Sapphire: similar to diamond, gold camo with sapphires embeded into it. unlocked by mastering a gun category. example: lmgs(unlock all attachments and all camos for all guns in a specific category)
Digitalized: the gun would look holographic.
Tesla Coil: similar to the guardian and sentry, but can only be destroyed with fmj, and can only be placed outside, slows enemies down and kills them in 2 seconds, can not be seen with engineer.
CLAW: similar to the a.g.r. but a high scorestreak requiring more than the claw.
Flamethrower- medium damage, medium-short range,burn damage included, quick reloads. attachments, napalm+(FMJ), second gas tank(extended clip), Toxic Gas(grenade launcher), electricity.
LMG: Low Recoil, Medium Fire rate, High damage, 100 bullet mag(box mag)
attachments,all lmg attachments, new electricity rounds exclusive only to this lmg.
tdm/kill confirmed extended, 1000 kills for one team to win, 45 minutes each round