Israel.
Pistols:
IMI Jericho 941
SIG P226, P228
Glock 17
SMGs:
Almost never used, M16's with 14.5", or in more elite units, 11.5" barrels are used instead. Micro Uzi is used SOMETIMES, but that's it.
Assault rifles:
Modified M16A1, sometimes A2, mostly in non-combat units.
M16A1, sometimes A2, modified with telescopic stock and 14.5" barrel in combat infantry units.
Very rare, flattops with 14.5" barrel, only saw one once, on a Unit 669 (air force combat search and rescue unit) officer.
IMI Galil SAR in Armored Corps, Artillery Corps, Combat Engineering Corps, Antiair Corps, with Galil AR sometimes used for training.
IMI Tavor is beginning to enter service now, mostly with SF units like YAMAM and Sayeret Egoz.
Sniper rifles:
M24
Galatz - Galil Tzalafim (sniper Galil), a 7.62mm Galil with scope, bipod, and a different stock.
Barrett M82A1
M16A1/A2 with either 20.5" or 14.5" barrel in designated marksman configuration (scope + bipod + cheek piece).
MGs:
FN MAG
IMI Negev (Minimi with folding stock)
Browning M2 .30cal (or at least I think that is it, our designation for it is just zero-three, and I never trained with it)
SF units got a lot more cool toys to play with though, for example, Shayetet 13 (naval commandos) use AKs, Sayeret Golani use RPK-74's, Sayeret MATKAL has PSG-1's in their arsenal, and so on.
Isayeret has a lot of info on this.