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The receiver extension is one of those AR parts nobody thinks about until they're building or refreshing a lower, and Strike Industries gave this often-overlooked piece some real attention. This is a 7-position, mil-spec diameter buffer tube machined from 7075-T6 aluminum, which is a genuine step up over the 6061 tubes you find on a lot of budget builds. That alloy choice means more strength in the areas that take a beating, and it drops onto any standard AR-15 receiver without any fuss. The Flat Dark Earth anodized finish looks great on a two-tone rifle or as part of a full FDE build.
The seventh position is the headline feature here. A standard carbine tube gives you six stops, and if your ideal cheek weld always seemed to land right between two of them, that extra notch closes the gap. You get finer length-of-pull adjustment so you can dial the stock exactly where it feels right. Fully collapsed it sits as short as a standard M4 stock, and stretched all the way out it runs a touch longer than a fixed A2 buttstock, so there's plenty of range to work with.
Strike scalloped the surface of the tube, which does two jobs. It shaves a little weight while keeping material where the stress actually lives, and it cuts down on friction with those tight-fitting stocks that can drag on a plain tube. The supported buffer retainer is a nice touch too, since it doubles as an indexing aid and takes some of the guesswork out of installation. It also plays nicely with the Strike Industries Pit Viper stock if you're chasing a compact, minimalist setup.
Worth knowing before you order: this runs a carbine-length internal setup, so it works with standard carbine buffers and springs. It is not built for rifle-length buffers, rifle-length springs, or the A5 buffer system. At 7.28 inches long and 3.8 ounces, it's a lightweight, straightforward upgrade for anyone building fresh or swapping out a plain-jane mil-spec tube.
It adds a seventh adjustment position instead of the usual six, giving you finer length-of-pull tuning for your stock. It's also machined from 7075-T6 aluminum for more strength than common 6061 tubes, and it has scalloped cuts that reduce friction and trim weight. A supported buffer retainer rounds it out and makes indexing easier during install.
Yes. The internal length matches a standard carbine buffer tube, so it runs your usual carbine buffer and spring. It is not compatible with rifle-length buffers, rifle-length springs, or the A5 buffer system, so keep your setup carbine-length.
It drops onto any standard AR-15 receiver and uses a mil-spec diameter, so mil-spec pattern stocks slide right on. If you have an AR-10 with a mil-spec threaded receiver being run as a carbine, it works there too. It's also compatible with the Strike Industries Pit Viper stock for a more compact build.
No, the package includes just the receiver extension itself. You'll need a castle nut and end plate to complete the install, plus your carbine buffer and spring if you don't already have them. Strike Industries offers matching FDE castle nut and end plate sets if you want to keep the look consistent.
| UPC | 708747546620 |
|---|---|
| Manufacturer | |
| Manufacturer Part Number | ARARET7FDE |
| Product Type | Buffer Tube |
| Style | Extension |
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