[Hectic]

Looks Good!!

Try 600 or 800 grit that'll put a nice shine and make it smooth like glass also for rounded parts put them in your drill chuck and then spin them with the drill in the sandpaper that'll do a great job and well your at it put the slide on the gun without the guts in the slide cycle it by hand a few times if you notice any friction points like where the back corner of the slide and frame make a small click as they pass smooth it out to give the gun a smooth action this will give you better gas consuption and faster rof and mabey even a few fps