Armalite DEF10 .308 16″ Threaded Barrel | 20rd

The Armalite DEF10 is a semi-automatic AR-10 platform chambered in .308 / 7.62x51mm that pairs a compact 16-inch threaded barrel with a durable, forged flat-top upper and a 6-position collapsible stock. The barrel is double-lapped and chrome-lined with a 1:11.25 right-hand twist for consistent stabilization of common .308/7.62 bullets, and the rifle ships with a 20-round Magpul PMAG. For optics under $1,000 that suit this platform, a Vortex Viper PST Gen II 1-6×24 offers a rugged, low-power variable option that complements the DEF10 for practical precision and range work.

Well suited to duty-style service roles and precision sporting or range applications, the DEF10 emphasizes durability and straightforward functionality without unnecessary features.

Product Specifications

• The action is Semi Auto.
• The caliber is listed as 7.62X51mm / .308.
• The capacity is 20 rounds.
• The finish is Black Hard Anodized / Manganese Phosphated.
• The materials are Aluminum/Steel.
• The stock is a 6-Position Collapsible design.
• The upper is a Forged Flat-Top with MIL-STD 1913 rail.
• The barrel twist is 1:11.25 RH.
• The barrel length is 16 inches and is threaded.
• The overall length is 35 – 38.3 inches depending on stock position.
• The weight is 7.9 lb.
• The rifle includes a 20-round Magpul PMAG.
• The barrel construction is described as a double lapped chrome lined/chrome moly barrel.
• The rail interface is MIL-STD 1913 (Picatinny).
• The UPC is 651984014257.

The DEF10 delivers Armalite build quality in a focused, no-frills AR-10 package. Its combination of a chrome-lined barrel, standard Picatinny top rail, and a six-position stock provides a useful balance of durability and adaptability for shooters who want a service-style .308 platform without excess weight or complexity. The included 20-round PMAG and threaded 16-inch barrel make it ready for a range of practical setups, from iron-sight zeroing to low-power variable optics for practical precision.