I E-mailed BM last week to ask an odd question and decided to post it here in case any of you were wondering:
The weight of a:
Front Sight Assy. = 5.2 oz.
3-rail gas block w/detatchable sight = 5.5 oz.
"Triple Mount" for .750" barrel = 3.84 oz.
GeneStoner = 210# fully loaded.