Get the soft recoil impulse and quick sight recovery you're looking for in your ultimate competition PCC AR9. The Kynshot RB5020SS buffer, designed in cooperation with Blitzkrieg Components, LLC., provides longer length and more weight for those who desire a short stroke competition action. With a length of 5.3in, this buffer will shorten the stroke of the bolt by 1.3in when installed in a standard AR15 carbine buffer tube(1). When installed in an AR10/A5 carbine buffer tube this buffer will shorten the stroke of the bolt by .5in, which can be increased by the addition of spacers(2). The damping level of this buffer is intended for lighter, competition type 9mm ammunition loadings for best performance and longest service life.Specifications for KynSHOT RB502SS 9mm Competition Short Stroke Buffer:Manufacturer:KynSHOTColor:SilverFinish:StainlessFabric/Material:17-4 Stainless SteelGun Make:AR PlatformGun Model:AR-10, AR-15Diameter:0.75 inLength:5.3 inWeight:7.7 ozAdditional Features:Short Stroke BufferCondition:NewGas System Type:Short-Stroke PistonCaliber:.355 CaliberOperating Temperature:-30 - 150 FahrenheitCountry of Origin:USAFeatures of KynSHOT RB502SS 9mm Competition Short Stroke Buffer Drop-In Replacement Reduce felt recoil Improve reliability Reduce bolt carrier speed Reduce wear on parts Reduce shock and vibration to optics Suppress bolt bounce Decrease sight movement Smoother operation Faster shot recovery time Military grade materials and manufacturing