WE Scar's lowers are plastic color tan or black like the RS versions. The Cansoft Scars lowers are clear. The only thing that hurts are the mags as they can range from $50-70 each after the purchase of the gun. If you planning to run Co2 mags I would get the renforced butt stock plate because they are prone to crack from the recoil. If you have a princess auto by you, They have o-ring kits from $5-19 that have tiny o-rings that work for the magazine fill valves. I just got my KJW M4 and its pretty good out of the box but the lower is tinted. The Kjw mags are plastic but they are alot thicker and hold more gas then the WE's.
Custom Kydex Holsters - pm me for details