Specification:
T6061 Aluminum
Steel Barrel nut
Camouflage ACU pattern
Fits .223/5.56 (AR15) spec.
Monolithic top rail (21mm)
With M-lok mounting slots for quick and easy installation
Lightweight design
Clamp mounting design , more easy installation
Barrel nut inside diameter: 1.02 in (26mm)
Barrel nut outside diameter: 1.35 in (34.4 mm)
Mounting thread spec.:   1-1/4-18 UNC
Package:
one handguard+screw+Barrel nut +wrench

Model no. : FLH-7C
Length:  7.2 inch

Model no. : FLH-9C
Length:  9.2 inch

Model no. : FLH-10C
Length:  10 inch

Model no. : FLH-11C
Length:  11 inch

Model no. : FLH-12C
Length:  12 inch

Model no. : FLH-13.5C
Length:  13.5 inch

Model no. : FLH-15C
Length:  15 inch