I have one and I love it. The battery space thing isnt that big an issue for the AS VAL, I run an AK stick Lipo in mine FFS. SR3M will be a different issue. In terms of build quality on the exterior they are tank like. Internally I find LCT hop ups to be disappointing so replaced mine with a steel Lonex one and G&G Green Hop Rubber with PDI barrel. Now shoots 55m+ easily. Lovely gun and certainly attracts attention. Loads of mags at Fire Support. I run 8 Mid Caps. Only thing with the replacement of the plastic hop unit its that it has more flex in it to allow mags to go in the steel one doesnt have this, so what you need to do is fit the hop unit but not tighten it down, put a mag in so that the hop unit is aligned properly, then tighten it down. My mags also need the lips filing slightly.