Maxim Defense SDX RFLX 300 Blackout 8.5″ Integrally Suppressed SBR

The Maxim Defense SDX RFLX is an integrally suppressed short-barreled rifle chambered in .300 Blackout. Built on the SDX platform, the SDX RFLX incorporates the M-Kore reflex suppressor, an over-the-barrel suppressor system designed to minimize added overall length while integrating sound suppression into the rifle's profile.

The 8.5" barrel pairs with an internal suppressor extension and a tuned gas system. According to the manufacturer, the SDX RFLX achieves a sound level of 129 dB at the shooter's ear when used with subsonic ammunition.

Key Features

• Chambered in .300 Blackout
• 8.5" barrel with integrally suppressed design
• M-Kore reflex suppressor — over-the-barrel configuration
• Internal suppressor extension
• Tuned gas system
• 129 dB at shooter's ear (subsonic ammunition, per manufacturer)

As an NFA item, the Maxim Defense SDX RFLX requires the applicable transfer process prior to taking possession. ICB Firearms is a family-owned retailer serving customers in Saint Clair Shores, Michigan and nationwide. Questions about this product are welcome — contact us for assistance.