Tippmanns aren't milsim markers.. Period. Take it from the kind of kid who has pictures of M16s and M14s and M60s and sutff all over his wall.
Ariakon/Armotechs are better, but I know these guns like I know the military phonetic alphabet... Which is good. And Armotechs and Ariakons just don't cut it. Their MP5 series looks nohting like an HK MP5. The WG65 is better then the WG75.. Way better. Way more realistic.. Teh clip kit is terrible, since you have an M4 with a mag that it looks like oyu just hot glue gunned on. And the WG-75 mag looks more like a 5.56mm mag.. But it doesn't. Actually, looks more like a HK G3 mag.. But not. The Stock looks terrible, the handgrip isn't realistic, and the barrel SERIOSULY needs a muzzle break.
I like Rap4s.. They are very nice. They have an M4, M16A1 and A2, SR-16... They also have MP5, MP5 A3, and a few other serieses I can't think of. They have a Glock 18 too. They also have 68 cal kits.. A Spyder that remarkebly looks nice.
www.rap4.com .