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The Griffin Armament LPR115 is the 11.5-inch version of the company's Low-Pro M-LOK rail, and it hits a sweet spot a lot of builders are after: light in the hand, slim enough to shoulder comfortably, and stiff enough that your lasers and optics don't wander when you load it up. The whole idea behind the Low-Pro line was to build a slim, ultralight rail that still fights flex better than most rails in its weight and size class. A custom aluminum extrusion with internal reinforcement does the heavy lifting there, cutting down on the give you feel when you're gripping hard in the shoulder pocket or leaning on a barricade.
That rigidity isn't just marketing talk. Griffin's internal testing showed roughly 70% less point-of-impact shift with IR laser aimers compared to competing slim rails, which matters if you're running a light or laser and expect it to hold zero under real pressure. The internal ribs and reinforcement spars give it a strong strength-to-weight ratio, and carefully placed slots along the rail help dump heat when you're running the gun fast.
Up top you get a continuous 1913 Picatinny rail for optics, sights, and QD swivel placement. M-LOK slots sit at the 3, 6, and 9 o'clock positions so you can hang lights, grips, bipods, and hand stops wherever they land naturally for you. The slabbed sides and taller profile actually give it a comfortable shape in the hand, and folks with smaller hands tend to appreciate the slimmer grip compared to a fat suppressor-ready rail.
Installation is refreshingly straightforward. The slip-fit clamp design skips shims and finicky timing, and the heavy-duty 17-4 stainless H900 barrel nut torques down to around 55 ft-lbs with the included Griffin armorer's wrench. The T15 flat-head clamp screws go to 25 in-lbs. It's the kind of rail most people can put on themselves in an afternoon without special tooling. Made in the USA at Griffin's Watertown, Wisconsin facility.
Yes, the kit includes the barrel nut and the Griffin armorer's wrench needed to get it torqued down. The slip-fit clamp design means you won't fuss with shims or timing, and the barrel nut goes to about 55 ft-lbs while the T15 clamp screws set to 25 in-lbs. Most people knock the install out in an afternoon.
The Low-Pro places M-LOK slots at the 3, 6, and 9 o'clock positions, so you've got side and bottom real estate for lights, grips, bipods, and hand stops. Up top runs a continuous 1913 Picatinny rail for optics and iron sights. It's a clean layout that keeps the rail slim while still giving you plenty of mounting options.
That's exactly what it was designed for. The internal reinforcement helps the rail hold point of impact when torque or load hits it, and Griffin's testing showed around 70% less POI shift with laser aimers versus typical slim rails. If you're running a light or laser and want it to stay zeroed on a barricade or bipod, this rail is built with that in mind.
The Low-Pro uses a set screw on the barrel nut for anti-rotation rather than tabs that index off the receiver, which actually makes it friendly for non-milspec and billet uppers. The slip-fit clamp keeps things simple and doesn't rely on the upper for timing. Just torque to spec and you're set.
| UPC | 689396839113 |
|---|---|
| Manufacturer | |
| Manufacturer Part Number | LPR115 |
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