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Here's an AR-15 upgrade that every rifle owner needs. Thermal bushings help keep heat from transferring into the handguard and into the operator's hand, and that really matters when you're firing long strings on the ranger or in competition. Samson replacement Evolution Rail Thermal Bushings are for AR-15 handguards only. Constructed of 303 stainless steel for resistance to heat transfer and unsurpassed durability. This outstanding AR-15 accessory comes as a set of two (2) thermal bushings.
