Material:aircraft aluminum T6 6061
Very easy to install (tool included)
5 Color options: Camouflage (ACU pattern) , Black , Tan , Flat Dark Earth , Camouflage (BUD pattern)
Quad Rail Handguard
With Front end cap
For  .223/5.56 (AR15) Types
Free Floating Quad Rail Mounting System
Free float design, allowing for direct mount to the receiver
Picatinny on all 4 sides rails(21mm)
Barrel nut inside hole diameter: 1.02 in (26mm)
Barrel nut outside diameter: 1.84 in (46.83 mm)
Barrel nut mounting thread spec.: 1-1/4-18 UNC
Front End cap inner diameter:  1.04 inch (2.63cm)

Dimensions 15" (length) x 2.5" x 2.5" (width)

Weight: 500g
# of Slots
36 on the top rail
35 on the side and bottom rails

Package:
One quad rail+barrel nut + jam nut+wrench+Front end cap

Model :

M16-15BCA (Black)

M16-15TCA ( Tan )

M16-15FDECA ( Flat Dark Earth)

M16-15CCA (Camouflage (ACU pattern)

M16-15BUDCA (Camouflage (BUD pattern)