Re: Which barrel should I get for my MR2?
J&J is always a good choice. Tried and true. Never had any experience with CP barrels myself.
Looking at the pictures.. they may or may not fit, best to stick with the J&J which you know will work.
Maddman Rocket valve
Trinity Front block
IPS Sunbear Bolt
Dark Horizon titanium striker
Green/silver VSC CCI Phantom
Red/Black PMR SE