Material:aircraft aluminum T6 6061
Very easy to install (tool included)
4 Color options: Camouflage (ACU pattern) , Black , Tan , Flat Dark Earth
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 12" (length) x 2.5" x 2.5" (width)
Weight : 480 g
# of Slots
29 on the top rail
27 on the side and bottom rails

Package:
One quad rail+barrel nut + jam nut+wrench+Front end cap
Carton package size:
13 inch x 3 inch x 3 inch

Model :

M16-12BCA (Black)

M16-12TCA ( Tan )

M16-12FDECA ( Flat Dark Earth)

M16-12CCA (Camouflage (ACU pattern)