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Maxim Defense 9mm Roller Delayed Buffer CQB - SKU: MXM-47838 - UPC: 680017478384
Product Description
The Maxim Defense 9mm Roller Delayed Buffer System (MXM-47838) is a recoil-mitigation upgrade engineered specifically for 9mm Pistol Caliber Carbines (PCC) equipped with Maxim Defense CQB compact stocks and braces. Designed to eliminate the violent bolt bounce and harsh violent recoil impulse typical of standard direct-blowback AR-9 platforms, this roller-delayed mechanism mechanically delays bolt unlock, yielding smoother cycling and flatter muzzle tracking.
Constructed from high-strength stainless steel components and heat-treated alloy steel rollers, the RDB system reduces reciprocating mass speed without requiring excessively heavy buffer weights. By delaying the initial rearward move of the bolt, chamber pressures drop to safe levels, significantly decreasing blowback gas and particulate debris expelled into the receiver—a crucial advantage when staging suppressed 9mm carbines.
Engineered exclusively for shortened Maxim Defense CQB buffer tube dimensions, the MXM-47838 provides drop-in installation without receiver modifications, delivering competition-grade speed and duty-grade reliability for compact 9mm AR systems.
*Armorer Bench Notes & Real-World Staging Guidance:
Fitment Matrix: Fits 9mm PCC AR-15 conversions and dedicated AR-9 lowers equipped with Maxim Defense CQB Stocks or CQB Arm Braces. (Designed for 9mm blowback bolt carrier groups with removable rear weight; NOT compatible with standard carbine-length buffer tubes).
- Verify host firearm is completely clear, magazine removed, and chamber visually and physically confirmed empty.
- Ensure the bolt carrier group (BCG) rear internal weight is removed to allow clearance for the RDB guide rod tail.
- Depress standard buffer retainer pin and slide out existing buffer and buffer spring from the Maxim CQB housing.
- Insert the Maxim Defense Roller Delayed Buffer assembly into the CQB tube, ensuring proper seating against the buffer retainer.
- Close upper receiver, perform manual cycle checks to confirm smooth bolt displacement and full lockup, then function check trigger/reset.
Key Features
- Roller Delayed Mechanism: Mechanically delays bolt travel to eliminate harsh direct-blowback recoil and bolt bounce.
- Optimized for Maxim CQB Tubes: Tailored specifically to fit shortened Maxim Defense CQB stock and brace buffer housings.
- Suppression-Optimized Cycling: Delays bolt unlock to drop chamber pressure, drastically reducing blowback gas and ejection port debris.
- Flatter Muzzle Sight Picture: Smooths out action cycling for faster follow-up shots and tighter double-tap splits.
- High-Durability Stainless Steel Build: Precision CNC-machined stainless construction built to withstand high round-count PCC schedules.
- Drop-In Installation: Replaces factory buffer/spring setups directly in compatible Maxim CQB systems.
Product Specifications
- Brand: Maxim Defense
- MPN: MXM-47838
- UPC: 680017478384
- Caliber: 9mm Luger / 9x19mm NATO
- Platform Compatibility: AR-9 / 9mm PCC with Maxim Defense CQB Stock or Brace
- System Type: Roller Delayed Buffer (RDB)
- Material: Stainless Steel & Heat-Treated Alloy Rollers
- Tube Compatibility: Maxim CQB Compact Receiver Extension Only
- Finish: Natural Stainless / Matte Steel
