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KynSHOT RB5000L Hydraulic Recoil Buffer – Optimized for .300 BLK & Subsonic Loads – 854476005072
The KynSHOT RB5000L is a specialized hydraulic buffer system meticulously engineered to solve cycling issues in "soft-cycling" or under-gassed AR-15 platforms. While the standard RB5000 is designed for full-power 5.56 NATO rounds, the "L" model is optimized for lower-energy applications, specifically .300 Blackout (subsonic) and suppressed setups. By utilizing a lighter internal spring and a more sensitive hydraulic damping curve, the RB5000L requires less force to initiate the compression cycle. This ensures that even low-pressure subsonic loads provide enough energy to fully cycle the bolt and reliably lock back on the last round—an area where heavier or standard buffers often fail.
Constructed from high-strength 17-4 stainless steel, the RB5000L provides the same legendary durability and recoil reduction as the rest of the KynSHOT line. Its patented hydraulic damping technology absorbs the violent shock of the bolt carrier's rearward motion, reducing felt recoil by up to 30% and eliminating "bolt bounce" during chambering. This leads to significantly flatter shooting, less optic vibration, and faster follow-up shots in 2026 tactical and competition environments. Designed as a direct drop-in for Mil-Spec carbine buffer tubes (7" internal depth), the RB5000L is the definitive mechanical solution for shooters running specialized short-barrel or suppressed .300 BLK builds.
Includes: (1) KynSHOT RB5000L Hydraulic Recoil Buffer. (Optimized for .300 BLK / Under-Gassed 5.56).
Key Features
- Optimized for Low Energy: Engineered with lighter damping resistance to ensure reliable cycling with subsonic .300 Blackout and under-gassed suppressed rifles.
- Last Round Lock-Back: Specifically designed to help rifles that struggle to lock the bolt open after the final shot when using low-velocity ammunition.
- 30% Recoil Reduction: High-performance hydraulic damping flattens muzzle flip and reduces the "sharpness" of the recoil impulse.
- 17-4 Stainless Steel Construction: Aerospace-grade materials ensure maximum corrosion resistance and structural integrity across millions of cycles.
- Optic Preservation: Drastically reduces the shock and vibration transmitted to sensitive electronic red dots and thermal optics.
- Military-Grade Seals: Certified for extreme temperature performance ranging from -30°F to +150°F, ensuring consistency in any climate.
Product Specifications
- Brand: KynSHOT (A Kyntec Company)
- Model: RB5000L (Low Power / .300 BLK)
- Compatibility: AR-15 (.300 BLK Subsonic, Suppressed 5.56, Under-Gassed builds)
- Tube Requirement: Mil-Spec Carbine (7" Internal Depth)
- Material: 17-4 Stainless Steel
- Weight: 4.0 Ounces
- Overall Length: 3.64 Inches
- Operating Temp Range: -30°F to +150°F
- MPN: RB5000L
- UPC: 854476005072
