Davidson Defense Ruckus w/Magpul BTR Brace 12.5-inch Carbine-Gas 1:8 6.5 Grendel AR-15 Freefloat Keymod Handguard Pistol Full Build Kit

The Davidson Defense Ruckus 12.5-inch Carbine is a comprehensive AR-15 build kit chambered in 6.5 Grendel. It features a medium profile 12.5-inch barrel made from 4150 CrMoV steel with a 1:8 twist rate, providing efficiency in stabilizing projectiles. The carbine-length gas system is paired with a micro low-profile steel gas block for reliable operation. The build includes a lightweight KeyMod-style handguard made from 6061-T6 aluminum, ensuring a balanced feel.

The upper receiver is constructed from anodized 7075-T6 aluminum with M4 feed ramps. A complete bolt carrier group (BCG) is included, made of 8620 alloy steel and 9310 alloy steel for durability. For stability, the kit comes with a Magpul BTR Brace that fits Mil-Spec buffer tubes, along with a heavy-duty, six-position buffer tube and standard carbine buffer. This build kit is designed for gunsmiths looking for a versatile and high-performing firearm platform.