I think converting the G3 will be easy since its the same shape once you take off the upper tac welded loc up for the G3 rifle. Then the mag has the same shape as the saiga mag and its only missing the loc up tabs which is easy to weld on. Just looking at it, it doesn't seem no biggie to do. I have some low temp weld thats good for 20,000lbs tenslie strenght so it will never come apart and the low heat means no distortion in the mag body too. I'm in the middle of hunting season right now but after turkey day I'll built a 30rder for my saiga. UKP