I too would like a different barrel choice than the stock. A lapco would sure be wonderful!
I put a palmer reg on mine and changed the springs to get it down to about 700 psi. Still loud, obnoxious, and a pig to shoot, but it's fun.
Stock barrel with First Strike yields a 3' grouping at 50 yards on a gun range with a bipod. Would love to tighten that up.
Compare that to one on top of the other with my buddy's DAM/Hammerhead at same distance. Literal 3" grouping. It's insane.