What are the other sites you know of?? I didn't search for too long but I only came across 007airsoft.com, mach1airsoft, and buyairsoft... and out of those buy was the cheapest.. but to be honest at the time I hadn't considered getting into the sport.. or I wouldn't have been as concerned with getting the cheaper one. Now thats all changed so I'm going to look into the gun smith inspection and maybe a couple upgrades..
On a side note..
Does "Tokyo Marui compatible" mean that all the parts that are built for Tokyo Marui guns should fit on?
Also, do you know the best place to find a good deal on a metal receiver for the M4?