The HM Defense HM15FMB556 Defender M5 is a modern AR-pattern rifle built with a match-grade HM MonoBloc barrel and features intended for accurate, repeatable performance. Its configuration suits range use, duty-type roles, and general-purpose sporting applications where reliability and modularity are valued. The rifle is finished in a black hard coat anodized metal and ships with a Mil-Spec HM stock and an enhanced polymer grip for standard ergonomics.
Key Specifications
- The caliber is 5.56x45mm NATO.
- The barrel measures 16 inches.
- The magazine capacity is 30+1 rounds.
- The barrel is a HM MonoBloc 4150 chromoly match grade barrel.
- The barrel features an integral machined gas block.
- The barrel is tripled honed and button rifled.
- The handguard is a 10.37-inch free-float unit with a Picatinny rail and M-Lok compatibility.
- The finish is a black hard coat anodized metal finish.
- The stock is a Mil-Spec HM stock.
- The grip is an enhanced polymer design.
Engineered for consistent performance, the Defender M5 pairs a match-grade HM MonoBloc barrel and robust M‑LOK-compatible handguard with proven ergonomics. The combination of a precision barrel, integral gas block, and a practical accessory interface makes this rifle a capable platform for range work, tactical training, and general-purpose field use. Its straightforward feature set is suited to users who prioritize durable construction and modularity without unnecessary complexity.
Product information is supplied by the manufacturer and/or distributor and may be automatically formatted or enhanced using AI for clarity and consistency. While we strive for accuracy, specifications, features, and included items may change without notice. Always verify details using the manufacturer’s official documentation and the information shown on this product page before purchase or use.




