The Versatile Interface Structure (VIS) upper receiver assembly is one of Vltor Weapon System's most innovative products. The VIS is a polylithic upper receiver assembly that connects the upper receiver and handguard into a single unit. This combination overcomes many problems that are associated with the traditional “two piece” design; most notably the greatly improved structural strength and repeatable accuracy. This affords the user all the benefits of a free-floating barrel and solid railed forend.

Specifications and Features:
Aircracft grade aluminum
T6 Hardening specifications
Polylithic design
Removable lower handguard
Quad rails
No foward assist

Fits:
Standard AR-15 components