These are DPMS-pattern .308 / AR-10 rifle build kits — a barreled upper plus the build parts to complete a large-frame .308 rifle. Each kit includes the barreled upper assembly (barrel, free-float handguard, muzzle device, gas system, bolt carrier group, charging handle) and the supporting parts, but does not include a lower receiver — pair it with a DPMS-pattern AR-10/.308 lower. No sights or optics included. Offered in 16″, 18″, and 20″ barrels and a range of finishes. Filter by barrel length, handguard, and color.

.308 AR-10 Rifle Build Kits

Filter

Choosing a .308 AR-10 Rifle Build Kit

With a large-frame .308, the first thing to confirm is the receiver pattern — it determines which lower, barrel, and parts will fit. Here's what matters.

DPMS pattern compatibility (read this first)

These kits are DPMS-pattern (DPMS-style), the most common large-frame .308 standard. Pair the kit with a DPMS-pattern AR-10/.308 lower and use DPMS-style components. They are not Armalite-pattern (the original AR-10) — DPMS and Armalite parts are not interchangeable, so match everything to "DPMS / .308."

What's in the kit

The barreled upper assembly (barrel, free-float handguard, muzzle device, gas block and tube, bolt carrier group, charging handle) plus the supporting build parts. The kit does not include a lower receiver or sights/optics — add a DPMS-pattern lower and your sighting system to finish. Exact contents vary by kit — check the listing.

Barrel length and finish

Barrels run 16", 18", and 20" (the 1:10 twist suits common .308 loads), with free-float Keymod, M-LOK, or tube handguards. Finishes include black, stainless, and Cerakote colors — Flat Dark Earth, OD Green, Burnt Bronze, and Tungsten Grey. Longer barrels favor long-range performance; 16" keeps it more maneuverable.

Building it out

Pair the kit with a DPMS-pattern AR-10/.308 80% lower, a lower parts kit, and a stock to complete the rifle. Browse AR-10/.308 barrels and upper assemblies if you want to swap configurations.

Frequently Asked Questions

Do these kits include a lower receiver?

No. The kit is the barreled upper and build parts only — it does not include a lower. Pair it with a DPMS-pattern AR-10/.308 lower (finished or 80%).

Are these DPMS or Armalite pattern?

DPMS-pattern (DPMS-style), the common large-frame .308 standard. DPMS and Armalite parts aren't interchangeable, so build with DPMS/.308 components — including the lower.

Do these kits include sights or optics?

No. You add your own sighting system. The free-float handguard and flat-top upper give you plenty of rail to mount an optic.

What do I need to finish the build?

A DPMS-pattern AR-10/.308 lower, a lower parts kit, and a stock with the correct .308 buffer setup. The kit covers the upper and the major build parts.

Do you need an FFL to buy a rifle build kit?

These kits don't include a lower, which is the regulated part — so the kit itself isn't the serialized item. Rules around lowers and kits vary by configuration and state and continue to evolve, so confirm current federal and state requirements and how a specific item ships before ordering. This is general information, not legal advice.