18" AR 15 .223 Wylde Rifle Build Kit

18" AR 15 .223 Wylde Rifle Build Kit

Everything you need to finish your lower—built for accuracy, built to last.

The 18" AR-15 .223 Wylde Rifle Build Kit from Black Rifle Depot includes everything you need to complete your stripped lower receiver with precision, reliability, and value in mind. This kit is centered around our premium 18" .223 Wylde Spiral Fluted Midlength M-LOK Upper Assembly, delivering sub-MOA accuracy with match-grade ammo and proper technique. The stainless barrel with a 1:8 twist rate offers versatility with both .223 Rem and 5.56 NATO rounds.

Included is a complete lower parts kit featuring a crisp 6.5lb trigger, an AR-15 carbine buffer tube kit with a Mil-Spec 6-position receiver extension, and a durable LE-style Mil-Spec adjustable stock. Rounding out the kit is a Black Nitride .223/5.56 BCG, charging handle, and stainless steel gas system, pre-assembled with a low-profile nitride gas block.

Kit Includes

• 18" .223 Wylde Spiral Fluted Upper Assembly (Midlength gas system, M-LOK handguard, stainless barrel)
• .223/5.56 Black Nitride Bolt Carrier Group (9310 bolt, MPI inspected)
• AR-15 Charging Handle (7075-T6 aluminum, hard coat anodized)
• AR-15 Carbine Buffer Tube Kit (6-position receiver extension, 3 oz buffer, carbine spring)
• LE-Style Adjustable Stock (Mil-Spec, high-grade polymer, 6-position, style may vary)
• AR-15 Lower Parts Kit (Complete kit w/ 6.5lb trigger, Mil-Spec components)
• Stainless Steel Gas Tube + Assembled Low Profile Gas Block (.750 or .625 depending on build)

Note: BCG and charging handle are included. Handguard and stock styles may vary by batch.

Backed by a limited lifetime warranty and built using quality materials and proper assembly practices, this BRD build kit delivers performance you can trust from the bench to the field.