i installed this on my century cetme sporter- not quite a real deal g3, but a cheap clone and fun nonetheless. the rail was simple to install. its weight is rather convenient because it helps to reduce some of the recoil of the .308. also, it makes for a convenient way to mount a bipod.
Pros: easy to install
Cons: big and heavy? no big deal though really...
This review was written in the old system and had content requirements that are different than reviews written today.