I have a 3” 12 gauge Browning auto 5 with a 32” full choke barrel and a 28” new browning miroku barrel with investor plus choke. I’m 5’9” 155# and the gun is kinda heavy for my liking. I was wondering if I put a sling on this gun will it hurt the value of the gun if I decide to sell it? Also was thinking of having the new barrel cerekote in flat black as it will mainly be used for turkey hunting. Any opinions?