Bandoliers are normal issue for mounted troops wearas an equipment like the Leather pattern(similar to the 1908 but in leather) used by ANZAC troops would be normal for infantry, other then that possibly gaiters if their wearing them, pics are so low res its not easy to see details..
In fact though they are Infantry, Mounted Infantry you ride to battle and dismount to fight... I know of no occasion where the ICC fought mounted, though the Bikaner(Indian)cameliers of the ICC apparantly did? on one occasion at the Suez canal earlier in the war, but they were an exception...
Seriously, just change the rifle, remove bandolier, add cartridge box, bayonet scabbard, cap pouch and you have Confederate firing lines, the poses are that good I say. Seems like these figures could be the base for ACW figures too, it's just sad to see that WWI and WWII figures seems better than pre WWI conflict figures..
Most model Vickers gunners end up looking as if they are doing field repairs, clearing a stoppage and not shooting it. Zvezda WWII BEF set is quite a good gunner pose.
The tripod has two front legs (with circular stops-shoes) which have quick release nuts and a longer rear leg with a shoe and fixes to the tripod with a "U" shaped bracket ie two legs the same, one different. The crosshead arm is a bit small (the curvy bit)