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TROY Swivel Push Button, Quick Detach, Black SMOU-SSQ-00BT-00
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TROY QD360, QD Sling Mount with Swivel, 360 Degree Push Button, Black Finish, Fits Battlerail SMOU-PBS-00BT-00
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Midwest Industries Heavy Duty Flush Button Quick Detach Sling Swivel, Black MI-HDFS