Its already got extened slid release and a ambi-safety. The rubber wrap-around grips have got to go.....$30 to $250 depending if you want basic wood, carbon fibre or recycled alien spaceship.
Front site is staked, but a gunsmith can cut and install a variety of new sites in the $100-$250 range. Rodger at Dark Int. does a lot of this type of work. Probably Gunner at Armco too.
Until you decide to do that, clean out the sites with a q-tip and repaint with white or coloured model paint.