Davidson Defense Tendon 7.5-inch 1:16 10MM AR-15 Freefloat M-Lok Handguard Pistol Complete Upper Build

Tendon 7.5-inch 10mm AR-15 Complete Upper

The Tendon is built around a 7.5-inch 10mm Auto barrel with an M4 contour, built from 4150 chrome moly vanadium steel and finished in Parkerized, paired with a "Vertex" enhanced pistol-caliber billet upper receiver. It pairs a 7-inch M-LOK handguard with a steel flash can at the muzzle, operating on a direct blowback system. A PCC bolt assembly and Mil-Spec charging handle round out the upper, giving the buyer everything needed on the upper side.

Key Features

• 7.5-inch 10mm Auto barrel, 1:16 twist, M4 contour, Parkerized finish
• Direct blowback operating system
• "Vertex" enhanced pistol-caliber AR-15 billet upper receiver
• 7-inch M-LOK handguard with partial Picatinny top rail
• Steel flash can, 10mm/.40 S&W pass-through
• PCC bolt assembly, 10mm/.40 S&W compatible
• Mil-Spec AR-15 M4 charging handle included

Barrel and Operating System

The barrel runs 7.5 inches long, chambered in 10mm Auto and built from 4150 chrome moly vanadium steel with a Parkerized finish and M4 contour. It carries a 1:16 twist rate and a 9/16x24 muzzle thread. This upper cycles on a direct blowback system, relying on bolt mass and recoil spring pressure rather than a gas system to cycle the action.

Upper Receiver and Handguard

The upper receiver is a "Vertex" enhanced pistol-caliber billet unit, purpose-built for the AR-15 pistol-caliber carbine platform. Over the barrel sits a 7-inch handguard finished in black, using an M-LOK attachment system with a partial Picatinny top rail section running along its length.

Muzzle Device

Capping the muzzle is a steel flash can, built with a bore sized for 10mm and .40 S&W pass-through. It threads onto the barrel's 9/16x24 pattern and is secured with the included 5/8-inch black crush washer.

Bolt Assembly and Charging Handle

A PCC AR bolt assembly is included, compatible with 10mm and .40 S&W and built around the blowback operating system. A Mil-Spec AR-15 M4 charging handle rounds out the upper's operating components.

Follow all manufacturer instructions and safe handling practices.

Ensure compliance with all applicable federal, state, and local laws.