Product Description The Leapers UTG PRO Model 4 MIL-SPEC 6-position collapsible AR-15 stock kit is precision machined to tight tolerances for a secure, repeatable fit. The aluminum receiver extension provides six length-of-pull positions so you can quickly adjust your rifle to your body type and shooting stance for improved control and consistency. Designed to minimize stock-to-buffer tube wobble, this complete assembly helps deliver a solid cheek weld every time you shoulder the rifle. The kit includes the polymer stock, aluminum receiver extension (buffer tube), castle nut, locking plate, action spring, and carbine buffer-ideal for converting from a fixed stock or completing a new build. Product Highlights 6-position MIL-SPEC collapsible stock assembly for AR-15 pattern rifles Precision fitment designed to reduce wobble and support a consistent cheek weld Complete kit includes stock, receiver extension, action spring, carbine buffer, castle nut, and locking plate Durable black finish with polymer stock and aluminum receiver extension construction Adjustable length-of-pull to enhance weapon control, reaction time, and accuracy Specs Brand Name: Leapers, Inc. - UTG Product Type: Collapsible stock assembly / stock kit Compatibility: AR-15 pattern rifles Positions: 6-position Buffer Tube Size: Mil-Spec diameter Color/Finish: Black Materials: Polymer stock; aluminum receiver extension (buffer tube) Included Components: Polymer stock, receiver extension, castle nut, locking plate, action spring, carbine buffer Weight: 18.2 oz Country of Origin: USA MPN: RBU6BM UPC: 4712274528277 Disclaimer: We strive to provide accurate and up-to-date product descriptions, specifications, and images; however, errors or omissions may occasionally occur. We are not responsible for any inaccuracies or discrepancies in the content provided. If you notice anything incorrect or unclear, please contact us so we can correct it. When in doubt, we recommend verifying details directly with the product&&';;s manufacturer.