Rebarrelling to a non-restricted should be fairly simple, and that way we can get rid of the butt ugly grenade launcher
Um wtf? Grenade launcher? I assume you're referring to the muzzle booster.
Why wouldn't you use one of the standard ones for re barreling? And by easy do you mean it could be done in someone's kitchen?
For $1500 bucks its not economical to spend hundreds on a re barrel IMO