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The Sabretube kit from Battle Arms Development is one of those parts you notice the second you pick up the rifle. Instead of a bulky mil-spec receiver extension, castle nut, and heavy stock, you get a slim dimpled tube, the lightweight fixed buttstock, and a QD endplate that all work together to shave ounces off the tail end of your AR. It is machined from billet aircraft-grade aluminum and given a Type III hard coat anodized finish, so it holds up to abrasion and corrosion just like you would expect from a part meant to live on a working rifle.
The standout feature here is that the Sabretube design does away with the castle nut entirely. That dimpled tube threads straight into the back of a standard AR-15 lower with the endplate, which cuts down on parts, weight, and one more thing that can loosen over time. The kit also includes a built-in non-rotating QD point plus a second attachment location on the endplate, so you can run a single-point sling and set it up for either side without buying extra hardware.
Installation is straightforward if you have swapped a buffer tube before. It threads on much like any receiver extension, and folks who have run it tend to describe it as light and quick to set up. Keep in mind the kit is compatible with carbine-length buffers and springs, and it is built for standard AR-15 lowers that do not rely on a captive rear takedown pin detent spring. You will want to supply your own carbine buffer and spring, since those are not part of the package.
This one earns its keep on competition guns, lightweight hunting builds, and any AR where you are counting ounces and want a clean look out back. The top of the stock is cut to match the aesthetic of Battle Arms Development's Workhorse and Rigidrail lines, so if you are already running their handguards it ties the whole build together nicely.
No, the buffer and spring are not included in the kit. You will need to supply your own carbine-length buffer and carbine buffer spring. The Sabretube is compatible with standard carbine-sized buffers, so most common options will work.
No, and that is one of the big selling points. The Sabretube design threads into the back of your lower along with the endplate and eliminates the castle nut entirely. That means fewer parts, less weight, and one less thing to stake or torque during your build.
It is built for standard AR-15 lower receivers that do not rely on a captive rear takedown pin detent spring. Installation is similar to any buffer tube swap, so it is a manageable job if you have done that before. It is a good idea to confirm your specific lower matches that standard setup before installing.
Yes. The kit includes a built-in non-rotating QD point on the tube plus a second attachment location on the QD endplate. That gives you flexibility to set up a single-point sling and configure it for your preferred side without buying extra hardware.
| UPC | 810033781018 |
|---|---|
| Manufacturer | |
| Manufacturer Part Number | BTLARM |
| Product Type | Buffer Tube Complete Assembly |
| Model | |
| Color | Black |
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