Head: Duke (BTR)
Torso and upper arms: Beach Head (SpyTroops) - modified
Crotch and lower legs: Flint (JvC) - modified
Lower arms: Big Brawler (SpyTroops)
Upper legs: Chuckles
Glasses: Black Out goggles - modified
Mortar: Short Fuze
Pistol: Lady Jaye (SpyTroops)
Backpack and shells: Downtown
Back-up piece: Tunnel Rat (SpyTroops)

I always loed Short Fuze's character, but couldn't seem to capture him in new-sculpt custom form... until I got that BTR Duke in an eBay lot. The head with the pointy nose was a dead-ringer fo rthe Joes' resident quick-tempered math geek. A little detail work on the glasses and a hunt for the original mortar really brought him together for me.