M-Lok Picatinny Rail, 5-Slot 7-Slot 13-Slot Aluminum Picatinny Rails Section for MLOK Compatible Systems with 6 T-Nuts & 6 Screws & 3 Allen Wrench (Black2, Hollow-Out Design)

Very good item. Sturdy Aluminium ( Aluminum, as you say ) manufacture. Nicely made; edges are nicely finished and on my application i used all three lengths together to cover the entire underneath of my M-Lok shrouded 16" barrel AR. All sections fitted together nicely. The screws that secure the locking top hats could be shorter by around 2mm but even though you'll not be able to secure the rail under the gas block, there simply isn't the clearance in my Mlok application, but no big deal, rail is solid. Super price also!

Installing was fine, no gaps or looseness so far... have a light that's pretty secure.

The Good: The rails are lightweight and inexpensive. According to my digital scale, each part, with screws and mounts, weighs 5-slot at 0.597 oz, 7 slot at 0.707 oz, and 14-slot at 1.013 oz. That is rather lightweight which is always a win. Getting 3x lightweight aluminum mlok rails for about $15 seems like a win.The Bad: The 5-slot and 13-slot rails aren't quite the right length to line up with the mlok rails securely. That's only really a problem for lasers or anything around accuracy.

Work well and fit well great deal

Very sturdy and I like the cutout style to give more air flow for cooling. Very fast delivery.

Love how light and robust it is. Highly recommend it if you need a strong yet light mounting rail.

Let's be honest- you're not buying this to get the highest quality thing out there. You're buying this because it's the cheapest thing you could find. Me too. This is decent pic rail for the chinesium that it is.Pros-SUPER light weightNothing stripped easily on installationGreat for lights, bipods, etcCons-Chinesium: probably garbage pot metal, I would not put sights or a laser on these and trust them to keep alignment

Seller provided very quick ship...no problems there, but the mount is Chinese -eesy. While I doubt it will fall off, it's certainly a less than quality fit. This is not due to anything OTHER than the poor design.While it's easy to assemble, there's enough slop in the single picatinny rail detent and less than adequate spring tension in the spring loaded arm that holds it in place, so that the whole mount moves a bit. This is true regardless of the rail the light as attached to.If it was a 200$ Streamlight, it would be on its way back for a refund. As it's a cheap Chinese knock off, it's a tradeoff I'll accept