Maxim Defense MD9 904S SBR 9mm 4.5-inch 33rd

Description

The Maxim Defense MD9 904S is a compact AR-9 style short-barreled rifle chambered in 9mm with a 4.5-inch free-floating barrel. It was engineered to meet demand for modern, compact AR-9 platforms and features a custom free-floating handguard designed to create a monolithic-like upper receiver. Controls are ambidextrous and the rifle ships with a PDW-style stock for a compact profile suitable for close-quarters roles, range work, and duties where a short, maneuverable platform is preferred.

Key Specifications

• The model is listed as MD9 904S.
• The caliber is 9mm.
• The barrel measures 4.5-inch for compact handling.
• The magazine capacity is 33 rounds.
• The action is Semi-Auto.
• The safety features Ambidextrous controls.
• The stock type is a PDW configuration.
• The grip material is specified as BCM.
• The finish is Anodized.
• The handguard is a free-floating custom design creating a monolithic-like upper; interface compatibility requires verification.

This MD9 904S delivers a compact, purpose-driven AR-9 platform with features aimed at users who value a short, well-balanced system for close-quarters operation, training, or duty use. Its free-floating barrel and custom handguard support consistent handling while ambidextrous controls and a PDW stock provide adaptable ergonomics for a wide range of shooters.