Kynshot RB5000L Hydraulic Buffer for .300 Blackout AR-15

Kynshot RB5000L Hydraulic Recoil Buffer

The RB5000L is a purpose-built hydraulic buffer system engineered specifically for .300 Blackout AR-15 platforms and other under-gassed configurations. This is the buffer you need when your rifle won't lock back on the last round with standard buffer systems.

Design and Function

The RB5000L employs a lighter construction than conventional buffers, requiring significantly less cycling force to operate. This design philosophy makes it ideal for low-velocity ammunition like .300 Blackout subsonic loads, where traditional buffers may cause reliability issues.

The hydraulic system absorbs the recoil impulse generated by the bolt carrier's rearward motion, effectively preventing bolt bounce during the chambering cycle. This controlled energy dissipation translates directly to improved shooter control and accuracy.

Performance Benefits

• Recoil Reduction: Reduces felt recoil by approximately 30%, minimizing muzzle flip and improving follow-up shot accuracy
• Reliable Cycling: Optimized for softer, more consistent cycling in under-gassed systems
• Versatile Spring Compatibility: Works with any buffer spring style, though reduced-power springs typically provide optimal performance
• Durable Construction: Stainless steel construction resists corrosion and wear

Specifications

• Compatibility: Fits Mil-Spec style carbine buffer tubes (7" internal depth)
• Material: Stainless steel
• Intended Use: .300 Blackout subsonic applications and under-gassed AR-15 platforms

Note

If your .300 Blackout rifle runs exclusively supersonic ammunition with firm bolt cycling and proper ejection, a standard AR-15 buffer may be sufficient.