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Maxim Defense SDX 510 5.56 NATO Integrally Suppressed Upper - 10.3" Urban

AR-15 Complete Upper Receiver

In stock
Only 1 left

FFL & SOT Required Before Shipping.

Please have your dealer email a copy of their FFL & SOT to [email protected] or fax it to 253-218-2998, referencing your name and order number.


Duty built for the world’s most rigorous demands, this suppressor system is designed to be the most robust and strongest suppressor in its category. Primary design features include the significant reduction of sound signature, reduction of recoil, and increase in accuracy. It has been repeatedly tested with SOCOM tables across a variety of calibers and has survived with no damage or significant change in sound reduction.


  • State-of-the-art MonoKore™ design
  • Suppressor has a simple 3-piece design
  • Military-grade materials.
  • Adds 7.25″ to the muzzle


  • Increase reliability and longevity with hose firearms due to extreme low gas blowback and low gain in hose weapon cyclic rate
  • Drops sound to well below hearing safe levels average measurement per MILSTD-1474D of 131dB with Lake City M855 green tip ammunition measured at the shooter’s left ear
  • Decreases flash, decreases recoil, increases accuracy
  • Fully and easily serviceable
  • Disassembles with common tools
  • Fully and easily serviceable


  • Caliber: 5.56
  • Weight: 7 lbs. 15 oz.
  • Material Composition: 17-4 stainless and 6AI-4V Titanium
  • Complete Overall Length: 33.1"
  • Suppressor Diameter: 1.75" outer diameter
  • Barrel Length: 10.3"
More Information
SKU MXM-49764
Product Type AR-15 Complete Upper Receiver
Manufacturer Maxim Defense
Color Urban Grey
Mount M-LOK
Platform AR-15
Barrel Length 10.3"
Caliber 5.56 NATO

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