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Troy built the Alpha Rail off the bones of their well-known TRX Extreme, keeping the tough reputation while making the whole thing easier to live with. This is a 15-inch free-float forend for AR-15 and M16 uppers, and the big draw is that it clamps onto a standard barrel nut instead of a proprietary one. That means no wrestling with a special wrench or tracking down brand-specific parts, and folks who have installed one tend to say it slides on and locks up without drama once the delta ring assembly is off.
The magic is in the low-profile locking mechanism. Rather than pinch bolts hanging off the side, the Alpha uses internal locking devices that grab the barrel nut and cinch down with hex screws, so the clamping stays tucked in tight against the tube. That gives you a slim, comfortable grip surface all the way down the 15-inch length, plenty of real estate for a support-hand hold, a bipod, or folding sights out near the muzzle. The full-length top rail runs flat and true with your receiver rail for a clean optics and iron sight setup.
It's machined from 6061-T6 aircraft aluminum and finished in Mil-Spec Type III hardcoat anodizing, the same coating that holds up to years of hard use and hot barrels. Because the tube pulls the shell away from the barrel and vents heat, it runs cooler than a lot of close-to-the-barrel designs during long strings of fire. The whole rail is made in the USA.
The Alpha uses an eight-position slotting system down the tube, and it comes with three detachable Picatinny sections: two 2-inch pieces and one 4.2-inch piece, plus all the mounting hardware. Bolt them on at the angles you need for a light, a laser, a vertical grip, or a hand stop, then leave the rest of the tube smooth and snag-free. Keep in mind the barrel nut is not included, and this rail does not use the TRX barrel nut or TRX wrench, so a standard AR-15/M16 nut is what you want.
No, the barrel nut is not included. The Alpha Rail is designed to work with a standard AR-15/M16 barrel nut, so if your upper doesn't have one you'll need to pick one up separately. Just note it does not use the TRX barrel nut or TRX wrench.
Most people find it straightforward for a free-float setup. You remove the delta ring assembly, slide the rail over the barrel and gas block onto the bare barrel nut, then tighten the internal locking screws. A little lube on the barrel nut helps if the fit feels snug at first, and using a length of rail across the top helps you get it lined up straight.
The full-length top rail handles optics and folding iron sights, and the tube has eight attachment positions for the included Picatinny sections. You get two 2-inch rails and one 4.2-inch rail, which is enough to run a light, laser, vertical grip, or hand stop wherever you like. The rest of the tube stays smooth for a comfortable grip.
At 15 inches, this rail suits rifle-length builds and works well on a standard 16-inch barrel, leaving a little barrel exposed at the muzzle. It clears a low-profile gas block, so if you're running an A2 or standard front sight base you'll want a low-profile block underneath. As always, confirm your gas block sits low enough for the tube to slide over.
| UPC | 812699015506 |
|---|---|
| Manufacturer | |
| Manufacturer Part Number | STRXAL115BT01 |
| Product Type | Railed Forend |
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