The VKTR VK-1 Complete AR-15 Upper with a 13.7-inch barrel (brand part no. V-4027-3410-012-RP) extends the VK-1 platform’s piston-driven reliability to a compact, carbine-length build. VKTR builds every VK-1 upper around a billet aluminum receiver and a gas-piston operating system, keeping fouling out of the action compared to a direct-impingement design. The 13.7-inch barrel length splits the difference between a short pistol-length upper and a full 16-inch carbine, giving shooters extra sight radius and velocity while staying compact. As a complete upper, it is ready to mount on a compatible AR-15 lower to finish the build.

Key Specifications

• Fitted with a 13.7-inch barrel, a popular length for compact AR-15 builds.
• Part of VKTR’s VK-1 complete-upper product line.
• Runs a gas-piston operating system rather than direct impingement.
• Upper receiver is machined from billet aluminum for a tight, rigid fit.
• Sold as a complete upper assembly, ready to mate to a compatible AR-15 lower.
• Built for the AR-15 platform, the most widely supported modern sporting rifle system.

Frequently Asked Questions

Does this upper include a lower receiver? No. It is a complete upper only and requires a separate, compatible AR-15 lower to finish the rifle.

What gas system does the VK-1 use? A gas-piston operating system, which VKTR runs across the VK-1 upper line to reduce fouling in the receiver.

What barrel length does this upper have? 13.7 inches, a length commonly used on compact AR-15 builds.

Buy the VKTR VK-1 Complete AR-15 Upper, 13.7-Inch

Add VKTR’s VKTR piston reliability to your next build from our rifle parts and accessories selection. Order it from our Lubbock, Texas gun shop and our team can help confirm fit with your lower.