I think CA makes the best m16/Ar15 wepon their metal and parts are easily upgradable.....you got a sick deal If it has the systema 700fps down graded to 500fps then you got a bullet proof mock wepon their. Weight is between 7-9 lbs, It is close to the primary wepon I use except mine is the M-4 about 6lbs but I got a 203 so mine is 9-10lbs with optics, rails and gear. CA makes a good m-16 wepon but for Mp5 and all the others their lacking in acuraccy and alot of other stuff but I always try to get a CA Metal case no matter what wepon I am building. Its Classic Army though not Classic Arms, classic arms is a real wepon manufacture. The only draw back and flawh of the AEG wepon is it is not water proof and it is electic so water crossings always make big problems, which is why a GBB is essential, theirs a demo of this senario in the second to last or last vid