CMMG 5.7x28mm AR Conversion Magazine, 40 Rounds

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  • You must be 18 years of age to purchase this item

    • Shipping restrictions apply to this product under some jurisdictions. Known age, state and local shipping restrictions are applied at checkout and may result in changes to an order. PLEASE NOTE: We do not accept returns of Ammunition for safety reasons. NEVER use any Ammunition unless it is specifically designed for your firearm.
    • This item cannot ship to Canada.

Key Features

  • Designed for 5.7x28mm AR conversions
  • Fits standard AR-15 lowers
  • Holds 40 rds. of 5.7x28mm ammo
  • Polymer construction
  • Retains last-round hold-open
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  • Easy Returns

The CMMG® 5.7x28mm AR Conversion Magazine holds 40 rounds of 5.7x28mm and fits in any standard AR-15 lower receiver. To use, simply attach a CMMG 5.7x28mm Radial Delayed Blowback Complete Upper Receiver to an existing AR-15 lower. Then, insert CMMG’s AR Conversion Magazine to safely feed 5.7x28mm ammunition.

PLEASE NOTE: CMMG recommends using a standard carbine buffer and action spring to reliably cycle the action in this configuration.

  • Designed for 5.7x28mm AR conversions
  • Sized like a standard AR-15 magazine
  • Fits standard AR-15 lowers
  • Holds 40 rds. of 5.7x28mm ammo
  • Polymer construction
  • Retains last-round hold-open

Order today!

Key Specifications

  • Item Number: 721014
  • Weight: 8 oz. (unloaded)
  • Mfg. Number: 54AFCA2
CMMG 5.7x28mm AR Conversion Magazine, 40 Rounds
CMMG 5.7x28mm AR Conversion Magazine, 40 Rounds
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Buyer's Club $40.49 Non-Member $44.99