Stripped Polymer AR-15 MKII AR15 lower receiver. Works with standard AR15 parts and AR15 spec uppers. Durable and light weight. 13 inch length of pull. Integrated buffer tube, pistol grip and fixed stock give this design its strength. INCLUDES TAKE DOWN AND PIVOT PINS, will require the installation of a lower parts kit, carbine buffer and carbine buffer spring. Light weight, Durable with lifetime warranty*. Required installation of a lower parts kit, carbine buffer and carbine buffer spring. 1lb 5.2 oz.