Stern Defense AR15 Mag Well Adapter for M&P .45ACP Mags - MAG-ADMP45

Overview

The Stern Defense AR-15 Magazine Well Adapter converts standard mil-spec AR-15, M4, or M16 lower receivers to accept Smith & Wesson M&P .45 ACP pistol magazines. Machined from 6061 T6 aircraft-grade aluminum with a hard-coat type 3 anodized black finish, it features a 4140 NiB-coated feed ramp to ensure reliable feeding and corrosion resistance. The adapter is designed for easy, drop-in installation and includes an ergonomic magazine release and a last-round bolt-hold-open feature. It is intended for use in building AR-platform pistol-caliber carbines or pistols, requiring a .45 ACP barrel, a Glock-cut bolt, and an upper receiver with an enlarged ejection port.

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