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Maxim Defense 9mm Roller Delayed Buffer for Carbine Buffer Tubes - SKU: MXM-47839 - UPC: 680017478391
Product Description
The Maxim Defense 9mm Roller Delayed Buffer System for Carbine Buffer Tubes (MXM-47839) is a premier recoil-mitigation drop-in upgrade engineered for 9mm Pistol Caliber Carbines (PCC) using standard AR-15 carbine-length receiver extensions. Designed to eliminate the harsh, snap-recoil impulse and violent bolt bounce common to traditional direct-blowback 9mm platforms, this mechanical roller-delayed system delays bolt unlock to produce significantly smoother cycling, flatter muzzle tracking, and faster follow-up shots.
Precision CNC-machined from high-strength stainless steel components with heat-treated alloy steel rollers, the RDB system reduces the required mass speed of the reciprocating bolt without adding excessive dead weight to the rifle. By delaying the bolt's initial rearward movement, chamber pressures drop to safe levels before extraction, drastically cutting down on blowback gas and debris expelled into the upper receiver—making it an ideal upgrade for staging suppressed 9mm carbines.
Engineered for seamless compatibility with standard AR-15 mil-spec and commercial carbine buffer tubes, the MXM-47839 installs easily without lower receiver modifications, delivering duty-grade reliability and match-grade speed to your 9mm AR setup.
*Armorer Bench Notes & Real-World Staging Guidance:
Fitment Matrix: Fits 9mm PCC AR-15 conversions and dedicated AR-9 lower receivers equipped with standard AR-15 carbine-length buffer tubes. (Requires 9mm blowback bolt carrier group with the rear internal weight removed; NOT compatible with Maxim CQB compact buffer tubes or rifle-length extensions).
- Verify host firearm is completely clear, magazine removed, and chamber visually and physically confirmed empty.
- Ensure the rear internal weight of your 9mm bolt carrier group (BCG) is removed to allow clearance for the RDB guide rod tail.
- Depress standard buffer retainer pin and remove existing buffer and carbine buffer spring from the receiver extension.
- Insert the Maxim Defense Carbine Roller Delayed Buffer assembly into the buffer 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
- Carbine Tube Compatibility: Tailored specifically to fit standard AR-15 carbine-length receiver extensions.
- Roller Delayed Mechanism: Mechanically delays bolt unlocking to eliminate violent direct-blowback recoil and bolt bounce.
- Suppression-Optimized Performance: Lower chamber pressure upon unlock drastically reduces ejection port gas blowback and facial debris.
- Flat-Shooting Control: Smooths out bolt cycling for rapid follow-up shots and tight double-tap groupings.
- High-Durability Stainless Build: Precision CNC-machined stainless steel construction engineered for high round-count PCC competition and duty schedules.
- Drop-In Installation: Directly replaces traditional buffer and spring setups in standard carbine buffer tubes.
Product Specifications
- Brand: Maxim Defense
- MPN: MXM-47839
- UPC: 680017478391
- Caliber: 9mm Luger / 9x19mm NATO
- Platform Compatibility: AR-9 / 9mm PCC with Standard Carbine Buffer Tube
- System Type: Roller Delayed Buffer (RDB)
- Material: Stainless Steel & Heat-Treated Alloy Rollers
- Tube Compatibility: Standard Carbine Receiver Extension (Mil-Spec / Commercial)
- Finish: Natural Stainless / Matte Steel
