KYNSHOT - Hydraulic Recoil Buffer for AR-10 with fixed stock In our experience, this is the softest running AR10 buffer on the market. It shock absorbs more than any other buffer design and makes a noticeable difference in recoil and shot recovery. Reduce felt recoil, improve reliability, reduce bolt carrier speed, reduce wear on parts, reduce shock and vibration to optics, and suppress bolt bounce with this simple drop-in replacement. Designed for AR-10 rifles with a full length, fixed stock. This buffer has a piston that is hydraulically dampened to absorb the shock of impact from the bolt carrier's rearward motion and to prevent bolt bounce as a new cartridge is chambered. You will feel less recoil and smoother operation with this buffer and you will see less movement of your sights during recoil for faster shot to shot recovery time. This buffer is made to the highest quality and durability standards. Can take all the punishment your rifle can dish out. Constructed using 17-4 Stainless Steel and is built to stand up to hard use. The hydraulic seal and porting technology used in this buffer has been thoroughly proven. Works with factory buffer springs or for the smoothest/quietest operation, pair with a JP Tuned and Polished .308 Rifle Spring. Weight: 7.3 OuncesLength when Compressed: 5.25"Mil-Spec Hydraulic Fluids and Seals - Ambient operating temp certified for -30F - +150F Made in USA Features: Machined 17-4 Stainless Steel Buffer Body Most recoil reduction of any type of buffer Mil-Spec rated hydraulic fluid and seals can operate in ambient temp of -30F to +150F Super Smooth Running Faster follow up shots Quiet Buffer Operation Reduced Spring Noise Compatibility: Designed for Fixed Stock AR-10s: Suitable for AR10 rifles with a full-length, fixed stock buffer tube. Spring Pairing: Compatible with JP Tuned and Polished .308 Rifle Spring for optimal performance. Weight and Dimensions: Weighs 7.3 ounces with a compressed length of 5.25". Temperature Range: Features Mil-Spec hydraulic fluids and seals certified for ambient operating temperatures between -30F and +150F.