I also own a version 2005 gr-16 R5...its a monster and since its the new version i havent had any problems mechanically yet. The only thing that happenes was that the stock got loose but thats about it..i have not opened it internally dont plan to do so as i am selling it. Shoots 330 with .20's.
N Sask R Infantry Reservist
Vltor + 553+Surefire = win