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This leaves the rest of the handguard streamlined for less weight and bulk. In essence, with a KeyMod handguard, you can hang an accessory using key-shaped cutouts in the position you desire - without all that extra unused Picatinny rail. Rail covers help, but the KeyMod system has truly revolutionized handguards. RELATED STORY: Top 14 Rails, Mounts & Handguards For the AK Platform.RELATED STORY: Mod Squad: The Birth of the KeyMod System.Quad-rail systems quickly became popular, but while they offer a lot of real estate for accessories, they also add a lot of bulk and can be a tad uncomfortable to grasp. While M16s originally shipped with polymer, triangular handguards that simply protected a soldier’s hands from barrel heat - literally guarding them - handguards later evolved to include Picatinny rails for attaching accessories.
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AR-platform handguards have come a long way, and they certainly contribute to the AR’s continuing dominance in the firearms industry.
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