CMMG’s 5.7 AR Conversion Magazines hold 10 or 40 rounds of 5.7x28mm and fits in any standard AR-15 lower receivers. To use, simply attach a CMMG 5.7x28mm Radial Delayed Blowback complete upper receiver to an existing AR-15 lower. Then, insert CMMG’s 5.7 AR Conversion Magazine to safely feed 5.7x28mm ammunition. CMMG recommends using a standard carbine buffer and action spring to reliably cycle the action in this configuration. The 5.7 AR Conversion Magazine also retains last round bolt hold-open functionality, allowing for faster reloads.
- 10 or 40 rounds, also available in 3-Packs
- 8 oz unloaded
Big Book Catalog, Issue:73, Page:074