We put down black mesh tarps purchased from harbor freight about 10 bucks each ,while others are repainting steel you pick up your brass we run 6 stages any where from 50- 75 guns and have no issues picking up between shooters .
As far as sights dawson I like dawson fiber optic front with adjustable rear sight. if you plan on changing trigger a Vaneck is good .But as other s have said try it stock first good luck with your new glock