Magpul M-LOK Polymer Picatinny Accessory Rail

I added this Magpul accessory rail to my M-LOK handguard to give my compact light and sling mount a secure spot—and it works beautifully. Made from a reinforced polymer, it feels tougher than it looks (and lighter than aluminum versions), and installation was a breeze with the provided hardware. Once torqued down, there's zero wiggle, and even after a few range sessions, it’s stayed rock-solid. Magpul’s thoughtful design—beveled edges and cam-style T-nuts—makes it functional and snag-free.If I’m nitpicky, the polymer finish isn't as sleek as machined metal, and you’ll notice a bit of flex under heavy downward force (not what I was doing). But the weight savings are real, and the cost is significantly friendlier than aluminum. For mounting lights, grips, or other accessories where every ounce matters, this polymer section hits the sweet spot between performance and value.

It’s Magpul quality so it’s obviously very good.

Unless I'm mounting a laser I almost always use polymer rails. The Aluminum rails I save for applications that absolutely demand superior hold and rigidity, mounting and precisely calibrating a laser is one such instance.But For the most part a polymer rail section is the superior choice in terms of both cost and functionality. The majority of accessories; such as Lights, Bipods, and Fore Grips, have no need for a precision mount. The polymer rail are also more forgiving of abuse, which most frequently comes from being smashed against something or having the retaining nuts/rail accessories over tightened. A polymer rail can deformed a fair amount and still be plenty functional. Additionally the precise application of a sharp knife can even return a previously unusable rail to a serviceable state in a relatively short period of time. Try doing that with an aluminum rail.My last reason for preferring polymer over aluminum has to do with protecting the free floating barrel shroud on many AR-15s. When stressed or torqued a polymer rail will give a bit due to being more ductile than aluminum, this means less force is transferred to the free floating barrel shroud if one of the rail accessories gets bashed or torqued somehow. This in turn means that your barrel shroud is much less likely to be damaged by a blow that is, at least in part, absorbed by a polymer rail.And it just so happens that Magpul makes some of the best you can ask to buy.

The foregrip of my tactical shorty shotgun is made by Magpul so when I wanted to mount a flood light on it I wanted a accessory rail made by the same manufacturer made to match. Because the grip is made of polymer it makes sense to use a polymer rail.It fits perfectly and has held the light rock solid even though blast after blast.Quick and easy to install and a precision fit.

Like most people here, I was looking for an inexpensive alternative for the Magpul M-lok rail sections for my rifles. As great as Magpul quality is, having to spend $10+ for each rail adds up extremely quick. These rails from RSR have solved my search for inexpensive, quality m-lok rails. Down to the key points:1. These have the CORRECT M-LOK screws! I know there have been issues with other rails sold on Amazon that have been advertised they are made for the m-lok system, but I can confirm that these have the exact screws needed for M-Lok rails.2. If you need rails for the standard Magpul furniture (such as their handguards), you will want their MOE rails - they have larger washers. These rails are specific for the M-Lok system, and small enough to work in the rails with keeping a very tight fit.3. This will not work for key-mod; they are two different systems.4. These have a nice and tight, flush fit to several of the M-lok rails I have used them on5. Any accessories I have attached to these rails, such as verticle grips and lights, have held a very secure fit and have not moved due to recoil or heavy use. They will keep them as secure as the Magpul rails6. In my package one of my rails was slightly curved/not straight (this is the reason for 4 stars and not 5). I thought this was going to be a bigger problem, but after I secured it the rail to my handguard, it secured flush with the handguard and I didn't notice any bend in it. However, I also used my hands to kind of bend it a little beforehand to get it straighter before securing. I know these are polymer, but it would be nice to have all of the rails come straight when they arrived.Overall, these are my go-to rails for any m-lok system; great price point compared to Magpul brand, while retaining what I would say is the same quality. There's no need to shell out $10-15 per rail just to attach a foregrip or light, when you can get the same kind of security with this option.