The CMMG 5.7 AR Conversion Magazine Gen II is a 32-round polymer replacement magazine for 5.7x28mm systems. Finished in black, this Gen II magazine incorporates an updated textured grip, 5.7x28mm side engraving, and improved feed lips. It is intended for use with CMMG 5.7×28 Radial Delayed Blowback uppers paired with MK4 or Mil‑Spec AR‑15 lower receivers.
Key Specifications
- The magazine capacity is 32 rounds.
- The stated caliber is 5.7x28mm.
- The body material is polymer.
- The finish is black.
- Designed fit is CMMG MK4 / AR15 platforms.
- The listed application is centerfire pistol.
- The overall dimensions are 1.20 x 2.75 x 6.70.
- The recorded weight is 0.35 (unit as provided).
- Other features include compatibility for 5.7 CMMG AR conversion systems and upgraded feed lips.
With Gen II refinements like the stylized grip texture and upgraded feed lips, this magazine provides a practical replacement or spare for owners of compatible CMMG 5.7 systems. Its polymer construction and AR‑platform fitment make it a straightforward choice for range use and routine handling when configured with the appropriate uppers and lowers.
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