MCMR features M-LOK Compatible mounting system.
Free Float Handguard eliminates loads from barrel, reducing the deflection for more accurate shooting.
Precision Machined Aerospace 6061-T6 Aluminum Alloy, for high strength and lightweight.
Proprietary engineered profile offers additional cross sectional strength.
Steel Barrel Nut (same KMR, MCMR, and QRF series), to resist movement under heat.
Hard Coat Anodized per Mil-A-8625F, Type III, Class 2
Handguard alone weighs 8.2 oz
Handguard mounting hardware 2.3 oz
Includes BCM M-LOK Compatible Sling Mount, (FREE for a limited time) 
1.3" Inside Diameter
1.5" Wide

Actual length when measured to flare is 13.4"

Designed to be used with pistol length, carbine length, mid length, or Mil-Spec M16 rifle length gas systems; all with a low profile gas block.
 
 
The barrel nut will fit over all mil-spec diameter barrels (max of 1")
 
Bravo Company MFG, Inc. US Patent 8904691