so are you trying to host a class or conduct your own class? the idea behind most carbine classes is that you are receiving training from some of he best, as in prior special forces and blackwater
my buddy took some video of 255 and 78 from a ride down last weekend. (9/3/2011) http://www.youtube.com/watch?v=DgS8tVuI-28 section of 78 between 800 (woodsville) and 77 (caldwell) http://www.youtube.com/watch?v=y31dBu8bhMk
i know the simon kobe can fits most aftermarket midpipes Link http://www.speedzilla.com/forums/rc51-general-discussion/34779-simonkobe-japan-motogp-exhaust-review.html
from what i have read into it, if you really need to run more than 30 rounds you can sbr your receiver and legally run mags over 30rds and due to a registered sbr being 'dangerous ordinance', greater the 30rds is gtg
i have 19 rounds in the box for it, if anything you could resale it in the future for $180-200 brand is Arminius, nothing special but it is pretty fun to shoot