Maxim Defense Industries 9mm Roller Delayed System – AR-15/AR-9 Carbine

The Maxim Defense Industries 9mm Roller Delayed System converts your AR-15 lower receiver into a reliable 9mm carbine using proven roller-delayed blowback operation. This system eliminates the need for heavy buffers and traditional direct blowback components, delivering softer recoil impulse and reduced bolt carrier movement compared to standard blowback 9mm AR builds. Ideal for shooters seeking improved shootability and reduced wear on lower receiver components.

Machined from steel and aluminum with a black finish, this system includes the complete roller-delayed bolt carrier assembly and barrel designed to work together as a matched set. Installation requires basic AR-15 armorer knowledge and standard tools—no permanent modifications to your lower receiver. The roller-delayed mechanism allows for lighter reciprocating mass while maintaining reliable function with standard 9mm ammunition.

• Part Type: Complete Roller-Delayed Blowback System
• Compatible Firearms: AR-15/AR-9 Lower Receivers (9mm)
• Material: Steel bolt assembly, aluminum components
• Finish: Black
• Installation: Drop-In (AR armorer experience recommended)
• Includes: Roller-delayed bolt carrier assembly, barrel, and mounting hardware