The Maxim SDX RFLX 300BLK 8.5" CTR Arid is an integrally suppressed short-barreled rifle built on the proven SDX platform. Chambered in .300 AAC Blackout, it uses Maxim’s M-Kore reflex suppressor, an over-the-barrel system that keeps overall length manageable while delivering excellent sound reduction and balance. The rifle features an 8.5" barrel housed under a SDX 2-piece M-LOK handguard, enhanced MIL-SPEC lower components, and a Magpul CTR adjustable stock for confident, repeatable handling.

This SDX RFLX configuration is ideal for shooters seeking a compact, suppressed rifle for range use, training, or general-purpose defensive roles where low muzzle report and controllable recoil are priorities. With a tuned gas system and internal suppressor extension, it achieves approximately 129 dB at the shooter’s ear with subsonic ammunition, offering a notably quiet shooting experience in a semi-automatic platform. The combination of thoughtful ergonomics, modern features, and integrally suppressed design reflects Maxim’s focus on innovation and refined craftsmanship in purpose-built firearms.

• Manufacturer: Maxim Defense
• Model: SDX RFLX 300BLK 8.5" CTR Arid
• Caliber: .300 AAC Blackout
• Action: Semi-Automatic
• Barrel Length: 8.5"
• Number of Magazines: 1
• Capacity: 30
• Unique Features: Integrally suppressed M-Kore reflex system, SDX 2-piece M-LOK handguard, Magpul CTR stock, Enhanced MIL-SPEC lower parts, Approx. 129 dB at shooter’s ear with subsonic ammo
• Threaded Barrel: Yes
• Weight: 7.13 lbs
• Length: 34"