Starting with a mod adapter is the thin end of the wedge, before you know it you've got a fancy silencer, aluminium sight rail, decent red dot sight to go with it, nice hand made wooden grips, fancy screws to hold said grips, stainless screws and bolts and a nice case to put it in. You then realise you're looking at £500 worth of investment in what is really a plinker. Looks good though.