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Building an AR pistol means getting the right receiver extension to match your configuration. This kit from LBE Unlimited pairs a smooth pistol buffer tube with all the components you need to handle recoil and spring function without the stock mounting hardware that defines a rifle.
The pistol buffer tube has no mounting notches or rails on the underside, so it stays clean for pistol builds and stabilizer braces. It threads into your lower receiver the same way a carbine tube does, but the design is purpose-built for your AR pistol. LBE includes a carbine-length recoil spring and standard carbine buffer so the action cycles smoothly without modifications. The black protective foam sleeve caps the rear of the tube for a more comfortable cheek interface.
You get everything required for a functioning receiver extension: the pistol buffer tube itself, a carbine recoil spring, a standard carbine recoil buffer, a receiver end plate, and a castle nut for assembly. This means you're not hunting down individual pieces from different sources. All components are manufactured in the USA, so you know the tolerances and materials meet consistent standards.
The kit installs into standard mil-spec AR-15 lowers without additional gunsmithing. Because the buffer tube is sized for carbine-length springs and buffers rather than full rifle-length systems, it's ideal for compact pistol builds with shorter barrels and carbine-length gas systems. If you decide to swap to heavier buffers like an H2 or H3 for tuning your specific build, the same tube works with different buffer weights.
Yes, the kit comes with a standard carbine buffer, but you can swap it out for heavier options like H2 or H3 if your specific build needs tuning. The carbine-length tube accepts any standard carbine weight buffer, so you're not locked into the included component if you want to adjust recoil impulse.
Absolutely. This kit is designed for standard mil-spec AR-15 lowers and threads in the same way as any other mil-spec receiver extension. Just make sure your lower is truly mil-spec diameter, not commercial spec, to ensure proper fitment of the castle nut and end plate.
The black protective foam sleeve covers the rear end of the tube for a more comfortable cheek interface when running a pistol brace. It also helps reduce noise slightly and adds a bit of cushioning to the back end of your build.
Yes, the key difference is the profile. This pistol buffer tube has no mounting notches or rails on the underside, so it won't accept a collapsible stock. It's specifically designed for pistol builds and stabilizer braces. Mechanically, both use the same carbine-length spring and buffer, but the shapes are different.
| UPC | 706612407717 |
|---|---|
| Manufacturer | |
| Manufacturer Part Number | PBUFKTBLK |
| Color | Black |
| Product Type | Buffer Assembly |
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