I think so. I think the only issue is it does look a little symmetrical. I guess depending on your figure placement; you might be able to unbalance the symmetry in some way. If you want, you could also try stacking both vehicles on one side and moving the gun over to the other extreme, but I like the way they both overran the gun simultaneously, gives the impression of a more powerful assault on it.
Just brainstorming out loud... not sure how many figures you were going to have on the final product, or their locations, but here’s a few doodles I made up, figures in red, general base size in reference to the vehicle/gun sizes was incredibly made up, so not sure how any of this would work out...
But for what it’s worth, my 2 cents