FWIW,

LaRue LT104 weighs 7.1 oz.
ADM Recon 8.4 oz.
ADM Scout 7.1 oz.
Armalite 30mm 6.8 oz., 1" 7.4 oz.
B-Square 6.3 oz. wink
Bobro 6.8 oz.
Burris PEPR 30mm 8.7 oz., 1" 8.3 oz.
CAA 30mm 4.9 oz., 1" 5.1 oz.
GG&G 6 oz.
GG&G FLT 5.5 oz.
RRA 10.7 oz.
Leatherwood 2.5 lbs.