KYNTEC | KynSHOT RB5004 Hydraulic Recoil Buffer AR-10 Carbine - “Shorty” Collapsible Stock
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KYNTEC | KynSHOT RB5004 Hydraulic Recoil Buffer AR-10 Carbine - “Shorty” Collapsible Stock
The KynSHOT RB5004 “Shorty” Recoil Buffer is designed for AR-10 carbines with a collapsible stock and an AR-15 length (7.0") buffer tube, which is common on many AR-10 applications. The RB5004 reduces felt recoil 20-30%, while largely eliminating muzzle flip. The improvement in weapon accuracy, specifically second and third shot accuracy, is even more noticeable as shooters report that their time to reacquire a target decreases, and in many cases never leaves their scope sights. This buffer has patented damping technology to absorb the shock of impact from the bolt carrier's rearward motion and to prevent bolt bounce as a new cartridge is chambered.
- Weight: 3.8 Ounces.
- Length when Compressed: 2.5" and replaces buffers that are 2.5” long.
- Mil-Spec Hydraulic Fluids and Seals - Ambient operating temp certified for -30oF to +150oF
- Designed for 7.62mm/.308 cal. AR style rifles with an M4 length buffer tube (which is 7” deep, and ¾” shorter than an Armalite AR-10 collapsible stock tube). This is a common factory stock arrangement on many factory .308 rifles such as DPMS, CMMG and many others. The best reference is that it replaces factory buffers that are 2.5" in length.
- Also works well with other calibers based on the .308 case such as the .338 Federal, .260 Remington and .243 Winchester if they have the M4 buffer tube. If you buy an aftermarket AR-15/M4 collapsible stock tube (receiver extension) for your .308 AR, this is the buffer you will need. The Magpul UBR stock also uses an AR-15 carbine length stock tube and would also require this buffer if used on a .308 rifle.
- DO NOT USE IN 9mm AR-15’s. For 9mm AR-15’s use KynSHOT P/N RB5007, RB5015HD, or RB5020SS. See selection matrix for recommend spring pairing.
Recoil Curve
Why KynSHOT?
Most current recoil systems utilize an undamped mass (tuned mass damper) to provide the necessary elements needed for the bolt carrier group to cycle. The problem is that none of the bolt carrier group’s or recoil spring’s stored energy are controlled which leads to instability, vibration, noise, and unpredictable operation.
This is where the patented KynSHOT™ recoil buffers provide the shooter a much more effective option. Please see the video above for a visual look at the energy absorption and functionality of the KynSHOT buffers. When the trigger is pulled, the bolt carrier group accelerates instantaneously from rest to a very high velocity. This change in momentum introduces the first mode of instability to the system. The KynSHOT buffers help mitigate this energy exchange by cushioning the velocity differential using the fundamental concepts of conservation of linear momentum. Additionally, as the bolt carrier group compresses the KynSHOT recoil system, a certain amount of energy gets stored in the internal recoil spring which is a function of the spring rate and the square of the displacement. As the compressed recoil spring drives the bolt carrier group forward into battery, the KynSHOT buffer absorbs that spring energy by controlling the last impact on the detent that would typically cause the muzzle and sights to jump. This is what separates the KynSHOT from all other buffer technologies. The KynSHOT buffer offers energy control and absorption while other buffer options re-introduce all that energy back into the system.
Taking an even deeper look into the rifle, the natural frequency of a spring-mass system is a function of the square root of the spring rate of the recoil spring divided by the mass. In an undamped system (like the H series buffers used today) the excitations associated with a given rate of fire cause a resonance effect with imbedded harmonics and high amplitude vibrations leading to weapon instability. This coupled with the undamped motion of the bolt carrier group make it very difficult to stay on target, causes system noise (twanging), and amplifies any recoil dynamics including sight vibrations, muzzle rise, excessive weapon wear, and excessive recoil.
The patented technology within the KynSHOT controls the harmonically excited vibrations associated with different rates of fire, clipping all the peaks at each natural frequency. By controlling these spring-mass vibrations and modal excitations, the KynSHOT generates a much smoother shooting experience.
In addition, unlike other self-contained closed loop hydraulic systems the KynSHOT buffers use our patented orificing and linearly proportional internal accumulation (thermal and mechanical) to prevent internal pressure spikes that could further exacerbate excitations and instability due to forced orifice flow. The KynSHOT technology smooths out the unit’s force vs. stroke curve, thereby eliminating other secondary forced excitations.
As a final precaution against induced vibration, the KynSHOT buffers contain a bumper, made of a proprietary elastomeric blend, that provides additional damping should the buffer contact the rear of the tube.
This is where the patented KynSHOT™ recoil buffers provide the shooter a much more effective option. Please see the video above for a visual look at the energy absorption and functionality of the KynSHOT buffers. When the trigger is pulled, the bolt carrier group accelerates instantaneously from rest to a very high velocity. This change in momentum introduces the first mode of instability to the system. The KynSHOT buffers help mitigate this energy exchange by cushioning the velocity differential using the fundamental concepts of conservation of linear momentum. Additionally, as the bolt carrier group compresses the KynSHOT recoil system, a certain amount of energy gets stored in the internal recoil spring which is a function of the spring rate and the square of the displacement. As the compressed recoil spring drives the bolt carrier group forward into battery, the KynSHOT buffer absorbs that spring energy by controlling the last impact on the detent that would typically cause the muzzle and sights to jump. This is what separates the KynSHOT from all other buffer technologies. The KynSHOT buffer offers energy control and absorption while other buffer options re-introduce all that energy back into the system.
Taking an even deeper look into the rifle, the natural frequency of a spring-mass system is a function of the square root of the spring rate of the recoil spring divided by the mass. In an undamped system (like the H series buffers used today) the excitations associated with a given rate of fire cause a resonance effect with imbedded harmonics and high amplitude vibrations leading to weapon instability. This coupled with the undamped motion of the bolt carrier group make it very difficult to stay on target, causes system noise (twanging), and amplifies any recoil dynamics including sight vibrations, muzzle rise, excessive weapon wear, and excessive recoil.
The patented technology within the KynSHOT controls the harmonically excited vibrations associated with different rates of fire, clipping all the peaks at each natural frequency. By controlling these spring-mass vibrations and modal excitations, the KynSHOT generates a much smoother shooting experience.
In addition, unlike other self-contained closed loop hydraulic systems the KynSHOT buffers use our patented orificing and linearly proportional internal accumulation (thermal and mechanical) to prevent internal pressure spikes that could further exacerbate excitations and instability due to forced orifice flow. The KynSHOT technology smooths out the unit’s force vs. stroke curve, thereby eliminating other secondary forced excitations.
As a final precaution against induced vibration, the KynSHOT buffers contain a bumper, made of a proprietary elastomeric blend, that provides additional damping should the buffer contact the rear of the tube.
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