HM Defense HM15 Billet Upper & Lower .300 BO Rail HM15-SPFSS-300-LR
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Aug 26, 2026
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HM15-SPFSS-300-LR
Description
This .300 Blackout HM Defense HM15 full billet upper and lower features a type III hard anodized finish, 14" length black picatinny rail, 16" spiral fluted 416 stainless barrel with 1:8 twist, mil-spec black flash hider, MOE magpul black stock, MOE magpul black grip, and PMAG Magpul magazine. HM Defense HM15 Billet Upper & Lower .300 BO Rail HM15-SPFSS-300-LR
