VFC Sig MCX AEG Airsoft Artisan SUR300 kit VFC Sig MCX telescopic stock Original parts included SHS internals Gate Titan Promertheus 6.03 inner barrel SUR300 rail wiggles a little bit. Would need shimming at some places to be more tight. Dunno why it's not a tight fit. The original rail doesn't wiggle at all. 950$ shipping included.