Blitzkrieg Components 9mm Hydraulic Buffer High Damped 4.0'' Stainless Steel. For Pistol Caliber Carbine builds that need increased shock absorption. Can be used in typical PCC carbine builds as well as short-stroke systems and for hotter ammo. This HD model is not recommended for short barreled builds since they do not run the bolt as hard and will get more effect from the standard model. This buffer model was developed to fill the need for stiffer shock absorption which is needed on some PCC guns. If you plan to run your gun in a short stroke manner then we recommend this buffer with our PCC buffer weight which will add mass while shortening the stroke. Many shooters feel that this buffer with the PCC buffer weight is the softest running even with a full stroke 16'' carbine. Blitzkrieg Components partnered with KynSHOT to develop a top-of-the-line 9mm specific AR-15 buffer using KynShot's Hydraulic Buffer Technology. The Hydraulic Buffer body uses hydraulic shock absorption to dampen the impact of the bolt at the rear of its travel and also to dampen the forward impact of the Buffer's weight as it chambers the next round. It's weight and length have been optimized for the 9mm application so that it runs reliably softens recoil smooths out the action and stops just behind the bolt catch using any 9mm Parabellum (9x19mm) ammo type. It provides the softest recoil impulse of any 9mm buffer we know of and will allow very fast follow up shots improved accuracy and less wear on the firearm. The hydraulic fluid and seals are made to meet mil-spec requirements and have an ambient temperature operating range of -30F to +150F. The blowback operation of a PCC AR-15 drives a very heavy bolt much harder than a standard AR-15 BCG and it needs to be dampened as much as possible to optimize the system reduce wear on the firearm and reduce recoil and sight movement. For this reason the buffer is a very important component in getting a AR-15 PCC to run at its full potential. The design is simple yet very effective and will feel softer and run quieter than any conventional AR buffer. Spring noise is also dramatically reduced using this buffer. The length of our buffer stops the bolt just behind the bolt catch on a 9mm AR-15 without the need for a spacer. Specifications for Blitzkrieg Components AR 9mm Heavy Damped Buffer: Manufacturer: Blitzkrieg Components Color: Silver Finish: Stainless Fabric/Material: 17-4 Stainless Steel Gun Make: AR Platform Gun Model: AR-9 Diameter: 0.76 in Length: 3.9 in Weight: 6 oz Condition: New Gas System Type: Blowback Country of Origin: USA Gun Type: Rifle Features of Blitzkrieg Components AR 9mm Heavy Damped Buffer Machined 17-4 Stainless Steel Buffer Body Increased Hydraulic Resistance and Heavier Return Spring 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 Package Contents: Blitzkrieg Components AR 9mm Heavy Damped Buffer What firearm models does the manufacturer say Blitzkrieg Components AR 9mm Heavy Damped Buffer is compatible with? The manufacturer suggests that Blitzkrieg Components AR 9mm Heavy Damped Buffer is compatible with AR-9Blitzkrieg Components RB5015HD: 9mm Hydraulic Buffer High Damped 4.0'' Stainless Steel