Would this be held up at customs?
 

http://www.gunnerairsoft.com/store/i...product_id=612

By definition it shouldn't, but it really looks like an upper receiver. It's just a rail system that goes over an mp5k. What do you guys think? Most likely held up for a few weeks, but then let through?

No that's fine. Its not a restricted part.

Won't be held up for looking like a receiver because it looks nothing like a receiver.

Is that rail system metal or plastic? That site doesn't specify but I'd hope so for that price!

There's an abs one in country for $69.
http://www.airsoftparts.ca/store2/index.php?main_page=product_info&cPath=65_85&produ cts_id=364

yeah, i'm looking for a metal one. a plastic one could crack if shot in a cqb environment. that gunnerairsoft one is classic army brand. so i assume it's metal. Classic army likes their metal.