How much do the PRI free float tubes weigh.  Im thinking its less than a DD or Troy railed forearm.  I'm particularly concerned with the rifle length, but its nice to know what the shorter tubes weigh too.

Somebody else did the research and posted this:

PRI tube weights courtesy of PRI:

PRI rifle free float fore with all rails, steel nut 1.19Lbs (19.04oz.)
PRI free float forearm with steel nut, no rails .855 lb. (13.68 oz.)      
PRI rifle free float forearm with aluminum nut, no rails .700  lb. (11.20 oz.)
PRI rifle length, all rails and aluminum nut 1.015 lbs. (16.2 oz.)
PRI carbine length, all rails and steel nut .95 lbs (15.2 oz)  
PRI Intermediate forearm with rails 1.010lb. Steel nut(16.2 oz.)
PRI Intermediate Forearm with Rails and High strength Aluminum nut.865lb. (13.8 oz.)

Due to the large amount of metal near the barrel nut and rails, the PRIs actually weigh more than the DD or LaRue in their original configuration.