Kaw Valley Precision PCC 6-Position Mil-Spec Kit Features The Kaw Valley Precision PCC 6-Position Mil-Spec Kit is built around a 7075-T6 aluminum buffer tube finished in matte black anodize for durability and corrosion resistance. The extra power 17-4 stainless steel spring is specifically tuned for pistol caliber carbine applications where blowback operation requires different spring rates than a standard gas-operated AR-15. Paired with a 7.5oz stainless steel blowback buffer the kit is matched to handle the increased bolt velocity and recoil impulse typical of PCC platforms. Together these components work to keep the action cycling reliably across a range of ammunition. Rounding out the kit Kaw Valley Precision includes a carbine stock lock ring castle nut and a carbine stock end plate giving builders the hardware needed to properly secure the buffer tube to the receiver. Having matched components from a single manufacturer reduces the guesswork that comes with mixing and matching parts from different sources for a PCC build. The 6-position buffer tube allows for adjustable length of pull letting shooters dial in stock position for comfort and control. For anyone building or upgrading a pistol caliber carbine this complete kit offers a straightforward path to reliable blowback function. Kaw Valley Precision PCC 6-Position Mil-Spec Kit Specifications Manufacturer: Kaw Valley Precision Type: Buffer Tube Kit Buffer Tube Material: 7075-T6 Aluminum Buffer Tube Finish: Matte Black Anodized Spring: 17-4 Stainless Steel Extra Power PCC Spring Buffer: 7.5oz Stainless Steel Blowback Buffer Includes: Carbine Stock Lock Ring Castle Nut Carbine Stock End Plate Available At: GrabAGun