KynSHOT RB5007 AR9 Recoil Buffer Stainless Steel

The KynSHOT RB5007 is a hydraulic recoil buffer engineered for AR-9 platforms and 9mm PCC applications. Constructed from 17-4 stainless steel, it uses hydraulic shock absorption to dampen the rearward impact of the bolt and reduce felt recoil. The unit is sized and weighted for reliable function across common 9mm loads and is a direct drop-in replacement for Mil‑Spec carbine buffer systems. It is optimized for use in PCC builds with 3.5″–7.5″ barrels when used unsuppressed.

Key Specifications

• The model number is RB5007.
• Construction material is 17-4 stainless steel.
• Intended platform compatibility is AR-9 / 9mm PCC.
• Optimized barrel range is 3.5″–7.5″ (unsuppressed).
• Designed as a Mil‑Spec carbine buffer tube drop-in replacement.
• Compatible with A5/AR-10 buffer tubes (internal depth 7.75″) when paired with the specified spacer.
• Works with any style buffer spring.
• Uses hydraulic shock absorption to dampen bolt impact.
• The buffer is designed to stop just behind the bolt catch in standard configurations.
• Manufacturer test data indicates approximately a 30% reduction in felt recoil.

As a component-level upgrade for pistol caliber carbine builds, the RB5007 simplifies bolt-carrier movement and reduces recoil impulse for quicker follow-up shots and smoother cycling. Its stainless construction and hydraulic damping make it a practical option for shooters seeking consistent, reliable buffer performance in 9mm AR-style platforms.