An AR-15 carbine stock parts kit includes all the essential components needed to install a collapsible stock on an AR-15 rifle with a carbine-length buffer system. Typically, the kit contains a carbine stock, buffer tube, buffer, buffer spring, end plate, and castle nut. It works with AR-15 lower receivers, carbine-length buffer assemblies, and upper receivers. This kit is ideal for custom builds, upgrades, or repairs, providing everything needed for a reliable, adjustable stock setup on AR-15 platforms.
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