AR-10 Build Kit

.308 Build Kit (Upper, Lower & M-LOK Forend Set)

Upgrade or start your .308 platform build with a matched kit engineered for precision, strength, and compatibility.

• .308 Upper Receiver (Assembled or Stripped)
This upper comes assembled with the ejection port cover and forward assist, ready for your barrel installation. CNC-machined from 7075-T6 aircraft-grade aluminum, it features a hard-coat black anodized finish for corrosion resistance and a non-reflective surface. An integral MIL-STD-1913 top rail accepts a wide range of rear sights, scopes, and optics. Available as a complete kit or stripped.
Compatible with Windham Weaponry .308 lowers only.

• .308 Stripped Lower Receiver (DPMS Style)
A high-quality stripped lower receiver built to DPMS pattern specifications, offering robust compatibility for .308 builds and ready for your preferred lower-parts setup.

• Windham Weaponry M-LOK Forend (Picatinny Railed)
CNC-machined from American-made 6063 aluminum extrusions and hard-coat anodized to MIL-SPEC 8625. Designed for maximum strength with minimized weight. The top rail is T-marked and manufactured to MIL-STD-1913, aligning perfectly “same-plane” with the upper receiver.
M-LOK mounting slots are positioned at 1:30, 3:00, 4:30, 6:00, 7:30, 9:00, and 11:30 for full accessory flexibility. Integrated QD sling swivel pockets at 3:00 and 9:00 forward positions offer convenient sling attachment. Includes a QPQ nitride-finished barrel nut and all mounting hardware. Features laser-engraved Windham Weaponry logos on the side panels. Made in the U.S.A.

Color options: