here's the total sprite list for xcom soldiers
xcom_0 = unarmored soldiers
xcom_1 = personal armor
xcom_2 = power armor and flying armor
xcom_0000 - xcom_0007 left arm (nothing carried)
xcom_0008 - xcom_0015 right arm (nothing carried)
xcom_0016 - xcom_0023 legs (standing)
xcom_0024 - xcom_0031 legs (kneeling)
xcom_0032 - xcom_0039 torso+head male soldier
xcom_0040 - xcom_0047 left arm (walking animation facing 000)
xcom_0048 - xcom_0055 right arm (walking animation facing 000)
xcom_0056 - xcom_0063 legs (walking animation facing 000)
xcom_0064 - xcom_0071 left arm (walking animation facing 001)
xcom_0072 - xcom_0079 right arm (walking animation facing 001)
xcom_0080 - xcom_0087 legs (walking animation facing 001)
xcom_0088 - xcom_0095 left arm (walking animation facing 002)
xcom_0096 - xcom_0103 right arm (walking animation facing 002)
xcom_0104 - xcom_0111 legs (walking animation facing 002)
xcom_0112 - xcom_0119 left arm (walking animation facing 003)
xcom_0120 - xcom_0127 right arm (walking animation facing 003)
xcom_0128 - xcom_0135 legs (walking animation facing 003)
xcom_0136 - xcom_0143 left arm (walking animation facing 004)
xcom_0144 - xcom_0151 right arm (walking animation facing 004)
xcom_0152 - xcom_0159 legs (walking animation facing 004)
xcom_0160 - xcom_0167 left arm (walking animation facing 005)
xcom_0168 - xcom_0175 right arm (walking animation facing 005)
xcom_0176 - xcom_0183 legs (walking animation facing 005)
xcom_0184 - xcom_0191 left arm (walking animation facing 006)
xcom_0192 - xcom_0199 right arm (walking animation facing 006)
xcom_0200 - xcom_0207 legs (walking animation facing 006)
xcom_0208 - xcom_0215 left arm (walking animation facing 007)
xcom_0216 - xcom_0223 right arm (walking animation facing 007)
xcom_0224 - xcom_0231 legs (walking animation facing 007)
xcom_0232 - xcom_0239 right arm (one-handed weapon)
xcom_0240 - xcom_0247 left arm (two-handed weapon)
xcom_0248 - xcom_0255 right arm (two-handed weapon)
xcom_0256 - xcom_0263 right arm (firing weapon)
xcom_0264 - xcom_0266 death animation
xcom_0267 - xcom_0274 torso+head female soldier
xcom_1000 - xcom_1007 left arm (nothing carried)
xcom_1008 - xcom_1015 right arm (nothing carried)
xcom_1016 - xcom_1023 legs (standing)
xcom_1024 - xcom_1031 legs (kneeling)
xcom_1032 - xcom_1039 torso+head male soldier
xcom_1040 - xcom_1047 left arm (walking animation facing 000)
xcom_1048 - xcom_1055 right arm (walking animation facing 000)
xcom_1056 - xcom_1063 legs (walking animation facing 000)
xcom_1064 - xcom_1071 left arm (walking animation facing 001)
xcom_1072 - xcom_1079 right arm (walking animation facing 001)
xcom_1080 - xcom_1087 legs (walking animation facing 001)
xcom_1088 - xcom_1095 left arm (walking animation facing 002)
xcom_1096 - xcom_1103 right arm (walking animation facing 002)
xcom_1104 - xcom_1111 legs (walking animation facing 002)
xcom_1112 - xcom_1119 left arm (walking animation facing 003)
xcom_1120 - xcom_1127 right arm (walking animation facing 003)
xcom_1128 - xcom_1135 legs (walking animation facing 003)
xcom_1136 - xcom_1143 left arm (walking animation facing 004)
xcom_1144 - xcom_1151 right arm (walking animation facing 004)
xcom_1152 - xcom_1159 legs (walking animation facing 004)
xcom_1160 - xcom_1167 left arm (walking animation facing 005)
xcom_1168 - xcom_1175 right arm (walking animation facing 005)
xcom_1176 - xcom_1183 legs (walking animation facing 005)
xcom_1184 - xcom_1191 left arm (walking animation facing 006)
xcom_1192 - xcom_1199 right arm (walking animation facing 006)
xcom_1200 - xcom_1207 legs (walking animation facing 006)
xcom_1208 - xcom_1215 left arm (walking animation facing 007)
xcom_1216 - xcom_1223 right arm (walking animation facing 007)
xcom_1224 - xcom_1231 legs (walking animation facing 007)
xcom_1232 - xcom_1239 right arm (one-handed weapon)
xcom_1240 - xcom_1247 left arm (two-handed weapon)
xcom_1248 - xcom_1255 right arm (two-handed weapon)
xcom_1256 - xcom_1263 right arm (firing weapon)
xcom_1264 - xcom_1266 death animation
xcom_1267 - xcom_1274 torso+head female soldier
xcom_2000 - xcom_2007 left arm (nothing carried)
xcom_2008 - xcom_2015 right arm (nothing carried)
xcom_2016 - xcom_2023 legs (standing)
xcom_2024 - xcom_2031 legs (kneeling)
xcom_2032 - xcom_2039 torso+head male soldier
xcom_2040 - xcom_2047 left arm (walking animation facing 000)
xcom_2048 - xcom_2055 right arm (walking animation facing 000)
xcom_2056 - xcom_2063 legs (walking animation facing 000)
xcom_2064 - xcom_2071 left arm (walking animation facing 001)
xcom_2072 - xcom_2079 right arm (walking animation facing 001)
xcom_2080 - xcom_2087 legs (walking animation facing 001)
xcom_2088 - xcom_2095 left arm (walking animation facing 002)
xcom_2096 - xcom_2103 right arm (walking animation facing 002)
xcom_2104 - xcom_2111 legs (walking animation facing 002)
xcom_2112 - xcom_2119 left arm (walking animation facing 003)
xcom_2120 - xcom_2127 right arm (walking animation facing 003)
xcom_2128 - xcom_2135 legs (walking animation facing 003)
xcom_2136 - xcom_2143 left arm (walking animation facing 004)
xcom_2144 - xcom_2151 right arm (walking animation facing 004)
xcom_2152 - xcom_2159 legs (walking animation facing 004)
xcom_2160 - xcom_2167 left arm (walking animation facing 005)
xcom_2168 - xcom_2175 right arm (walking animation facing 005)
xcom_2176 - xcom_2183 legs (walking animation facing 005)
xcom_2184 - xcom_2191 left arm (walking animation facing 006)
xcom_2192 - xcom_2199 right arm (walking animation facing 006)
xcom_2200 - xcom_2207 legs (walking animation facing 006)
xcom_2208 - xcom_2215 left arm (walking animation facing 007)
xcom_2216 - xcom_2223 right arm (walking animation facing 007)
xcom_2224 - xcom_2231 legs (walking animation facing 007)
xcom_2232 - xcom_2239 right arm (one-handed weapon)
xcom_2240 - xcom_2247 left arm (two-handed weapon)
xcom_2248 - xcom_2255 right arm (two-handed weapon)
xcom_2256 - xcom_2263 right arm (firing weapon)
xcom_2264 - xcom_2266 death animation
xcom_2267 - xcom_2274 torso+head flying armor
xcom_2275 - xcom_2282 legs (flying)
Thank you Daiky for clearing the "right arm (firing weapon)" part up.
you can also get the list as .txt files at
https://openxcommods.weebly.com/downloads1.html