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Since its inception, Magpul’s M-LOK system gained in popularity, inching ahead of KeyMod. M-LOK boasts squared slots that allow compatible accessories to mount directly to the hand guard. This simply allows better reassurances that all manufacturers’ parts will be compatible with each other, that design and TDP updates can be disseminated efficiently, as needed, and that the M-LOK logo can be reassurance to the customer that the product they are buying will perform as expected.”
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“We did, however, realize the problems with simply offering the system as open source, and we do require a simple free license agreement with all manufacturers. “M-LOK was introduced as free from the start, and always has been, because the goal has always been to promote a universal standard,” Duane Liptak, executive vice president of Magpul told in an email. Magpul says the free licensing decision was enforced to retain consistency and quality across the platform. Free licensing allows other gear manufacturers to create M-LOK guards and accessories, so long as the makers receive approval from Magpul. Magpul chose not to open-source its creation, opting for free licensing instead. In 2014, Magpul upgraded the MOE style, debuting M-LOK which offered a similar look and feel to MOE, but with larger, durable, squared-sided slots. Continuing mounting innovation into 2009, the company released MOE handguards, bringing the same slot system to mainstream consumers. The slot-like design originated in 2007 on the Masada Concept Rifle, which featured a polymer handguard with three vent holes acting as negative space for accessory mounting. Magpul’s Masada Concept Rifle was the first to feature slotted ports for accessory mounting.
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This design allows M-LOK compatible accessories to mount at the front or rear of the slots. The Modular Lock, or M-LOK, system ditches the keyhole shape in favor of slots and benefits from attachment lugs on accessories that are t-shaped and bi-directional. The open source nature encourages gear makers to use the lightweight system when designing handguards, accessories and even full rifles. The open source designation allows any company to make rails or accessories using KeyMod without paying royalties. The result of a partnership between VLTOR and Noveske, the open-source KeyMod design was released to the public domain in 2012. To attach an accessory, users line up the lugs on the part with the round part of the keyhole then slide it forward and tighten the screws. KeyMod rails consist of rows of keyhole shapes that allow KeyMod-compatible accessories to mount into place on the handguard. KeyMod utilizes keyhole shapes to mount rifle accessories to the handguard.
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