The Troy 7-inch Drop-In Rail is a non free-floating direct replacement for all M4/AR15 Carbine length plastic hand guards with a round end plate. Its patented clamping design ensures a solid mounting platform and provides a true optical mounting platform that increases the modularity and accuracy of the M4.
Specifications:

Type	Drop-In Rail
Firearm Type	AR15/M4
Firearm Model	10/22
Material	Aluminum
Finish	Black Hard Coat Anodized
Features
Adjustment Type
Positions
Length of Pull
Rails
Texture Type
Swivel Studs
Free Floating
Grip Type
Tube Included
Max Capacity