Why would a weapon be 1000. It should at most be 400-500.
Polycounts are usually based on the tri count so. Get the number of faces you have. Multiply it by 2 and there's your polycount.
thats inaccurate unless all of you faces are quads
the l4d2 weaponset polycounts range from 1000 triangles to 2000 triangles because i didn't limit it I made a mistake when making them and not keeping them low