Build that ddin't happen. The Troy VTAC Alpha Rail is a one-piece free floating modular rail for the AR-15 and M16 systems. It is easy to install due to the use of the standard barrel nut. This system also includes (2) 2" rail sections and (1) 4.2" rail section.

Features:
Slotted cooling holes
Mil-Spec hardcoat anodizing
Utilizes the standard AR-15/M-16 Barrel (Not included)

Weight:
13" - 13.4 oz