Kaw Valley Precision 6 Position Mil-Spec Stock Completion Kit w/ 4.3 oz Buffer Multi Medium. It contains everything needed to install Mil-Spec stocks from Magpul BCM MFT Luth-AR and many others. There are many ways to smooth the operation of a AR-15 Carbine. One of the most cost effective and quickest upgrades available is installation of a KVP Heavy Tungsten Buffer. There are many added benefits once you install a KVP tungsten buffer. Benefits include: increased reliability reduced wear and tear of critical internal parts reduction in felt recoil reduction in bolt bounce as well as eliminating the annoying "rattle" of standard carbine buffers. Manufactured to meet the highest quality KVP Heavy Tungsten Buffers are within a tolerance of +/- .005 oz resulting in a more consistent higher quality buffer. Specifications for Kaw Valley Precision 6 Position Mil-Spec Stock Completion Kit: Manufacturer: Kaw Valley Precision Color: Multi Fabric/Material: 7075-T6 Aluminum Stainless Steel Gun Make: AR Platform Gun Model: AR-15 Condition: New Size: Medium Package Contents: Kaw Valley Precision 6 Position Mil-Spec Stock Completion Kit (1) 7075-T6 Aluminum Mil-Spec 6-pos Buffer Tube Matte Black Anodized (1) 17-4 SS Carbine Buffer Spring - Passivated finish (1) KVP Heavy Tungsten Buffer (4.3oz) (1) Carbine Stock Lock Ring-Castle Nut (1) Carbine stock end plate What firearm models does the manufacturer say Kaw Valley Precision 6 Position Mil-Spec Stock Completion Kit is compatible with? The manufacturer suggests that Kaw Valley Precision 6 Position Mil-Spec Stock Completion Kit is compatible with AR-15Kaw Valley Precision KVP-MilspecKit-4.3: 6 Position Mil-Spec Stock Completion Kit w/ 4.3 oz Buffer Multi Medium