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Magazine Extensions

Maximize your carry capacity with Magazine Extensions from GunMag Warehouse. Whether you’re looking for factory extension sleeves, aftermarket upgrade kits, or extended floor plates for factory and aftermarket magazines, we offer a huge selection of magazine extensions from top-selling brands, such as KRISS®, Ruger®, Tyrant Designs®, and CMMG®. What are you waiting for? Shop our full collection of mag extensions today!

  1. Warne Scope Mounts +5 Extended Base Pad for Sig Sauer P320 Pistols - Black
    Warne Scope Mounts +5 Extended Base Pad for Sig Sauer P320 Pistols
    (1)
    $47.99 $49.99 $29.99 $39.99 Save $20.00
  4. Strike Industries +5 Extended Magazine Plate for Sig Sauer P320 Pistols - BLK
    Strike Industries +5 Extended Magazine Plate for Sig Sauer P320 Pistols
    $41.99 $39.99 Save $2.00
  5. Timber Creek Outdoors Sig Sauer P320 Magazine Extension Plate - BLK
    Timber Creek Outdoors Sig Sauer P320 Magazine Extension Plate
    (1)
    $49.99 $29.99 $31.99 Save $20.00
  6. Odin Works +5 Magazine Extension for Sig Sauer P320 Pistols - Black
    Odin Works +5 Magazine Extension for Sig Sauer P320 Pistols
    $35.99 $39.99 $33.99 $38.99 Save $2.00
  11. Timber Creek Outdoors Sig Sauer P365 Magazine Extension Plate - BLK
    Timber Creek Outdoors Sig Sauer P365 Magazine Extension Plate
    Out of stock
    $49.99 $29.99 Save $20.00
  12. Tyrant Designs +3 Magazine Extension for Sig Sauer P365 X-Macro Pistols - BLK
    Tyrant Designs +3 Magazine Extension for Sig Sauer P365 X-Macro Pistols
    (7)
    $37.99 $39.99 $34.99 $35.99 Save $4.00
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