Specification:
Material:aircraft aluminum T6061
Tan , Black, FDE (Flat Dark Earth) three colors for selection
Front end cap (optional)
Quad Rail Handguard
Fits .223/5.56(AR15)
Free Floating Quad Rail Mounting System
Free float design, allowing for direct mount to the receiver
Picatinny on all 4 sides rails
Very easy to install (tool included)
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 in (26.3mm)

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 (optional)

Carton packaging size:
16.5 inch × 3 inch × 3 inch

Model:  M16-15
Color: Black

Model:  M16-15T
Color: Tan

Model:  M16-15F
Color: FDE (Flate dark earth)