Maxim Defense SDX RFLX 300 Blackout 8.5″ CQB Arid Integrally Suppressed SBR

The Maxim Defense SDX RFLX is a .300 Blackout integrally suppressed short-barreled rifle built on the SDX platform. This CQB configuration features an 8.5" barrel and the M-Kore reflex suppressor, an over-the-barrel system that keeps overall length compact while integrating sound suppression directly into the design. The Arid finish completes this configuration.

The SDX RFLX uses a tuned gas system paired with an internal suppressor extension. According to Maxim Defense, this combination achieves 129 dB at the shooter's ear when firing subsonic ammunition.

Key Features

• Chambered in .300 Blackout
• 8.5" barrel
• M-Kore reflex over-the-barrel integrally suppressed design
• Tuned gas system with internal suppressor extension
• 129 dB at the shooter's ear with subsonic ammunition (per Maxim Defense)
• Arid finish
• CQB configuration

As a short-barreled rifle with an integrated suppressor, the SDX RFLX is an NFA-regulated item. All applicable transfer requirements apply prior to purchase and transfer.

ICB Firearms is a family-owned retailer in Saint Clair Shores, Michigan, with access to an extensive distributor network. Contact us for assistance or questions about this product.