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AR15.COM
5/26/2014 9:49:03 PM EDT
How much do SDMR rails weigh?
5/29/2014 9:00:40 PM EDT
[#1]
A few weeks ago emailed them with similar questions. Here's their reply:
General Description: Single piece Free Float rail, with single rail on the top and three permanent 2” rail sections at muzzle end.

General Data:
Inner Diameter:   ---------------------    1.39”

               Outer Diameter: --------------------       1.75”

               Barrel Nut: ---------------------------Uses mil-spec AR-15/M16 barrel nut

               Material: -----------------------------        6061 T6 Aluminum

               Coating: ------------------------------        MIL-A-8625 TYPE III CLASS 2 HARD COAT ANODIZED w/Teflon

               Mounting screw torque spec:      8-10 ft/lbs

             Rail section screw torque specs: 20 in/lbs

             Length Rail section w/QD: ------- 3.32”

             Length Rail section w/o QD included: 2.25”

             Quick Detachment Point: -------- 5 points; 3 Muzzle End (Left, Right, Bottom) 2 Rear (Left, Right
10” SDMR
               Weight:  -------------------------------9.42 ounces

               Length:  --------------------------------9.76”

               Works with: -------------------------- Mid-Length and Carbine length gas system w/ LP gas block
11” SDMR
               Weight:  -------------------------------~ 10 ounces

               Length:  --------------------------------11.31”

               Works with: --------------------------Mid-Length and Carbine Length gas systems w/ LP gas block
13” SDMR
               Weight:  -------------------------------11.6 ounces

               Length:  --------------------------------13”

               Works with: --------------------------Rifle, Mid or Carbine Length gas systems w/ LP gas block
15” SDMR
               Weight:  -------------------------------13.45 ounces

               Length:  --------------------------------15”

               Works with: --------------------------Rifle, Mid or Carbine Length gas systems w/ LP gas block
6/14/2014 9:46:21 AM EDT
[#2]
aimsurplus has a great sale going on right now with these. I'm going to wait for lighter weight options before I upgrade though.