In this video you can learn a lot about the weapons sound effects in Call of Duty: United Offensive.
—— SIDEARMS ——
00:00 M1911 Colt .45
00:24 Webley MKIV
00:54 Tokarev TT33
01:18 Luger
—— SEMI-AUTO RIFLES ——
01:43 M1 Garand
02:09 M1A1 Carbine
02:39 Tokarev SVT40
03:09 Gewehr 43
—— BOLT ACTION RIFLES ——
03:36 Springfield
04:17 Lee-Enfield
05:00 Mosin-Nagant
05:32 Scoped Mosin-Nagant
06:06 Kar98k
06:38 Scoped Kar98k
—— SUBMACHINE GUNS ——
07:15 Thompson
07:47 Sten
08:16 PPSh
08:59 MP40
—— SUPPORT MACHINE GUNS ——
09:27 BAR
10:04 Bren
10:36 MP44
11:11 FG42
—— LIGHT MACHINE GUNS ——
11:41 M1919A6 .30 cal
12:24 Degtyarev DP28
13:00 MG34
—— HEAVY WEAPONS ——
13:43 Bazooka
14:17 Panzerfaust 60
14:31 Panzerschreck
15:07 Flamethrower
—— EQUIPMENT ——
15:33 M2 Frag Grenade
15:50 MK1 Frag Grenade
16:07 RGD-33 Stick Grenade
16:23 Stielhandgranate
16:38 Smoke Grenade
17:07 Satchel Charge
(via: Hectorlo)