I've run a couple 10 round mags through an SL8, stock configuration with a G36 scope on it.
I liked it...the stock felt weird to me, but I'm a big guy...and the stock's pistol grip is kind of weird for me.
It was a snap to clean. Mag changes were pretty quick and easy...but it's lack of a bolt release makes it somewhat cumbersome to release the bolt with the charging handle. I guess lots of use/training with it would fix that awkwardness, though.
The scope, by the way, was dead on. No adjustments needed to be made. It was printing where it should at about 100 yards, for a 200 meter zero.
If you don't mind the color (or plan on getting it dyed), then by all means, go for it. I'm a little leery of the M16 magwell...it just looks weird to me. Hopefully when the ban sunsets, we'll be able to put real G36 magwells in, and use real G36 mags
With real G36 stocks and all...