The VLTOR VIS Upper Receiver combines a forged flat-top receiver with a machined, free-float handguard in a single integral unit. The receiver is made of ultra strong 7075 T-6 aluminum. This provides a completely solid, perfectly aligned 6061 aluminum quad rail system for the best possible mounting of optics, BUIS and accessories. Forged flattop VIS receiver and machined, free-float handguard are fused into a single component with an exclusive welding process to provide a rock solid, quad-rail platform for maximum flexibility in mounting optics, backup sights, lights, vertical grips, and other accessories. The Versatile Interface Structure (VIS) offers a perfectly aligned top rail that cures the indexing problems common with flattop receivers and separate railed fore ends. The VIS upper includes four, MIL-STD 1913 Picatinny rails. There is a continuous, uninterrupted length of rail on the VLTOR receiver from the charging handle to the gas block allowing maximum flexibility in mounting optics. The bottom rail section of the VIS upper receiver is easy to remove and allows the fitting of an M203 grenade launcher, flare launcher or SOPMOD accessories that require barrel access. The VLTOR VIS upper is completely compatible with mil spec lowers. Another feature exclusive to the VLTOR upper is the modular shell deflector and bolt assist assembly. The VLTOR VIS enables the owner to choose between a case deflector/bolt assist combo or case deflector only.The VIS manufacturing process allows the receivers to accept standard M16 or AR15 barrels with low profile gas block. A barrel nut and wrench are included. Models available are as follows:
VLTOR VIS-1 – Carbine length 14.5″ (36.8cm) O.A.L. 7″ (17.8cm) handguard length. 21.5 oz. (609g) wt.
VLTOR VIS-2 – Mid-length 16.5″ (41.9cm) O.A.L. 9″ (22.8cm) handguard length. 25 oz. (709g) wt.
VLTOR VIS-2a – Extended Mid-length 17.5″ (44.4cm) O.A.L. 10″ (25.4cm) handguard length. 26 oz. (737g) wt.
VLTOR VIS-3 – Rifle Length 19.875″ (50.5cm) O.A.L. 12″ (30.5cm) handguard length; 29 oz. (822g) wt.
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