VIS-KMSL: KeyMod™ Polylithic Upper with Slimline Profile


VIS-KMSL: KeyMod™ Polylithic Upper with Slimline Profile


From: $574.95

After much demand from our customers, the VIS-KM has gotten a new improved version of the lower handguard. This flat bottom lower handguard allows for an overall height reduction, slimmer profile, and a wider base. Based solely in the KeyMod™ mounting system, the user will be able to attach any KeyMod™ accessory to the five mounting surface panels positioned around the barrel. The user will find that the flat bottom profile has improved ergonomics when in operation. Note: The VIS-KMSL comes supplied with the stripped upper only. The barrel, sights, and all other accessories must be purchased separately.

Export Control:
Many of VLTOR’s products are export controlled by the International Traffic in Arms Regulations (ITAR). Shipments from VLTOR may contain products controlled by the U.S. DoS or the U.S. DoC. Export of such items may not be done without prior approval from the U.S. Government and VLTOR.

Clear Selection
  • Aircraft-grade aluminum construction
  • Hardened to T6 specifications
  • Hard coat anodized, black per MIL-A-8625 Type III Class 2
  • 6013 forged upper with 6061 extruded handguard
  • Removable lower handguard
  • M203 barrel mounting compatible
  • Compatible with most Mil-Spec AR-15 parts and most Keymod mounted accessories
  • Available in either shell deflector only or forward assist models



1. Will a standard barrel nut work?

No. You do have to use the provided barrel nut and “one-time use wrench”

 2. Do you sell an armorers version of the VIS wrench?

We do not. Our VIS wrenches are meant for one barrel installation. You can purchase additional VIS nuts and wrenches separately.

 3. Will the Noveske KX3 fit underneath the handguard? Will a suppressor fit?

The Noveske KX3 or a suppressor will not fit underneath the VIS. The VIS only has a one inch diameter which doesn’t allow enough clearance.

4. What kind of mounting block should I use?

We recommend that you use the Geissele Reaction Rod for installation. Damage could incur if you use clamp style mounting blocks or blocks that do not support the upper internally. This could void your warranty.

 5. How do you remove the forward assist to install a custom dust cover?

Due to our Lifetime Warranty, we advise that you not remove or attempt to remove your forward assist. Our Lifetime Warranty covers all of our products as long as they are not modified in any way (i.e. disassembly, Cerakote, painted, Durakote, etc.). We do offer a service in house that will maintain your Lifetime Warranty. Please contact us to arrange this service.

 6. Do you make a VIS that is compatible with .308?

We do not current have a .308 compatible MUR available; however, our Research and Development team is exploring this area.

7. What is included with the VIS Upper Receiver?

Included with the VIS Upper receiver is the VIS Barrel nut, the VIS barrel wrench, and the M203 mounting bracket and screws.

8. I want to know how much barrel will be protruding from the handguard. How do I measure this?

If you visit the “specifications” tab it lists the handguard length. This measurement is taken from the barrel extension flange to the end of the handguard. You must first know the barrel length from the back of the barrel extension flange forward to determine the amount of handguard that will cover your barrel. *All measurements are nominal and subject to change*

Handguard Length12.22 inches13.78 inches
Overall Length19.87 inches21.45 inches
Weight25.50 oz27.03 oz
Interior Diameter1.03"1.03"


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