AR-15 and AR-10 Build Kit Types

Everything you need to build an AR-15 or AR-10 — rifle kits, pistol kits, lower build kits, 80% lower packages, and conversion kits. All first-party kits are assembled in the USA with mil-spec components. Select a kit type below to browse by caliber and configuration.

Build Kits

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Find the Right Kit for Your AR-15 or AR-10 Build

AR-15 Rifle Kits cover .223/5.56, 300 Blackout, 7.62×39, and 9mm — 16" barreled upper, handguard, BCG, lower parts kit, and stock hardware, with or without an 80% lower. Pistol Kits use the same calibers with 7.5"–10.5" barrels and pistol buffer setup. AR-10/.308 kits are DPMS-pattern, 16"–20" barrels, no lower included. Lower Build Kits bundle a stock, buffer assembly, lower parts kit, and grip — everything to finish a stripped or 80% lower receiver. 80% Lower Build Kits are the same, configured specifically for 80% builds, and some include the lower itself. Conversion Kits cover .22LR drop-in units, 9mm magazine conversion blocks, and Adams Arms piston kits for existing AR-15 platforms.