How is the installation with the front iron sight fixed (that mine has)Lose those hand guards. They are complete crap with no heat dissipating use. Get some of these. They are cheap and made from billit aluminum. Both my Sport II's have them. Attach all sorts of options. Mine are over-scoped (eyes not so good now) with 10-40x56 scopes for that "up close and personal view. https://ar15discounts.com/products/aim-sports-m4-carbine-quad-rail-black/