Is eh. Layout is fine, buildings look fine, but there is too much open space that could use at least some form of cover, and the buildings need more color variation. Lattices on that radio tower should be replaced in part by normal bricks.
Spawn room looks need a lot of work, and you have inconsistencies with the weapon eras. I see a Springfield/garand rifle in the midst of automatic and semi auto assault rifles.
Suggestions: punctuate the flat empty areas with assortments of crates, burning piles of rubble, sandbags, and just stuff in general. Balance out the distribution of buildings and make it so that people can't shoot across the whole map from where they start out from. Don't include the tank near the other base as it unbalances gameplay.
4/10, rating is only building style and layout. I will change this to include actual gameplay quality if I experience it.