This KynSHOT hydraulic recoil buffer is made for AR-15 carbines that use a mil-spec carbine buffer tube with a 7-inch internal depth (KynSHOT part no. RB5000). It works with any mil-spec buffer spring and installs as a direct drop-in replacement for the standard buffer. KynSHOT uses patented technology to absorb the energy of the bolt carrier’s rearward movement, helping eliminate bolt bounce during chambering. The result is less felt recoil, less muzzle rise and a quicker return to the sight picture between shots. It is made in the USA from 17-4 stainless steel.

Key Specifications

• The platform is AR-15 carbines with a collapsible stock, the setup this version is designed for.
• Buffer tube internal depth is 7 inches, the mil-spec carbine tube standard.
• Weight is 4.2 ounces, which adds reciprocating mass at the buffer without a heavy-buffer swap.
• Overall length is 3.65 inches, the extended length of the hydraulic body.
• Length when compressed is 3.25 inches, the working stroke of the buffer in use.
• Buffer diameter is 0.69 inch, sized for the carbine buffer tube bore.
• Construction is 17-4 stainless steel throughout, made with military-grade materials and processes.
• The unit uses mil-spec hydraulic fluids and seals for consistent damping.
• Operating temperature is certified from -30F to +150F, so it holds up in cold and heat.
• It is compatible with all AR-15 calibers, including .450 Bushmaster, 7.62×39, 6.8 SPC, 6.5 Grendel, 7.62×40 Wilson, .204 and .350 Legend.

Frequently Asked Questions

Can I use this buffer in a pistol-caliber carbine? No. KynSHOT states this buffer is not for PCCs and points PCC builders to its dedicated pistol-caliber carbine buffers instead.

Which AR-15 calibers does it work with? KynSHOT lists compatibility with all AR-15 calibers, including .450 Bushmaster, 7.62×39, 6.8 SPC, 6.5 Grendel, 7.62×40 Wilson, .204 and .350 Legend, as well as 5.56/.223.

Does it need a special buffer spring? No. It works with any mil-spec buffer spring and drops in where the standard buffer sits.

Buy the KynSHOT AR-15 Hydraulic Recoil Buffer for Carbine Collapsible Stocks

Recoil on a carbine is rarely the problem, but the harsh buffer bounce that comes with a light rifle can be. Swapping in a hydraulic buffer is a ten-minute job with no tuning, and it keeps the rifle on target through rapid strings. Order it with other AR buffer system parts from our Lubbock, Texas gun shop and get fast, insured shipping.