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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!

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  1. KRISS Vector Gen 2 9mm +23 Round Magazine Extension Kit for Glock 17 Magazines - BLK
    KRISS Vector Gen 2 9mm +23 Round Magazine Extension Kit for Glock 17 Magazines
    (59)
    $32.99

    Add to Cart to See Price.

    $25.99 Save $7.00
  3. KRISS MagEx 12+ Extension Kit for Glock 21 Magazine Complete Kit
    KRISS Vector Gen 2 .45 ACP +17 Round Magazine Extension Kit for Glock 21 Pistols
    (6)
    $32.99 $28.99 $29.69 Save $4.00
  5. Shield Arms +5/+4 Magazine Extension for Glock 17 / 22 Pistols - BLK
    Shield Arms +5/+4 Magazine Extension for Glock 17 / 22 Pistols
    (3)
    $39.99 $35.99 $36.99 Save $4.00
  7. Lancer L5AWM +6 Extended Magazine Basepad Right
    Lancer L5AWM Plus 6-round Extended Magazine Basepad
    (57)
    $24.99 $27.99 $22.99 $25.99 Save $2.00
  8. KRISS Vector Gen 2 9mm +23 Round Magazine Extension Kit for Glock 17 Magazines 3-Pack - BLK
    KRISS Vector Gen 2 9mm +23 Round Magazine Extension Kit for Glock 17 Magazines 3-Pack
    (8)
    $85.99

    Add to Cart to See Price.

    $67.99 Save $18.00
  10. 3 Pack - KRISS Vector Gen 2 .45 ACP +17 Round Magazine Extension Kit (BLK) for Glock Magazines
    3 Pack - KRISS Vector Gen 2 .45 ACP +17 Round Magazine Extension Kit for Glock Magazines
    (25)
    $85.99

    Add to Cart to See Price.

    $67.99 Save $18.00
  11. Die Free Co Dos Boot +2 Magazine Extension for Magpul Gen3 AR-15 PMAGs 3-Pack - BLK
    Die Free Co Dos Boot +2 Magazine Extension for Magpul Gen3 AR-15 PMAGs 3-Pack
    (2)
    $20.99
  12. Strike Industries +4/+5 Magazine Extension for Glock 17 / 22 Pistols
    Strike Industries Aluminum +4 / +5 Magazine Extension for Glock 17 / 22 Pistols
    $38.99 $43.99 $37.99 $39.99 Save $4.00
  13. KRISS Vector Gen 2 Glock 20 10mm 33-Round Magazine Extension Kit Full
    KRISS Vector Gen 2 10mm +18 Round Magazine Extension Kit for Glock 20 / 40 Pistols
    (3)
    $32.99

    Add to Cart to See Price.

    $25.99 Save $7.00
  15. Strike Industries +5 Magazine Extension for PMAG Gen M3 - Black
    Strike Industries +5 Magazine Extension for PMAG Gen M3
    $12.99
  19. Tyrant Designs 9mm +5 Magazine Extension for Springfield Echelon Pistols - BLK
    Tyrant Designs 9mm +5 Magazine Extension for Springfield Echelon Pistols
    (4)
    $39.99 $32.99 $35.99 Save $7.00
  21. Panzer Arms +2 Extended Magazine Tube for 12GA Panzer / Benelli M4 Shotguns - BLK
    Panzer Arms +2 Extended Magazine Tube for 12GA Panzer / Benelli M4 Shotguns
    (25)
    $26.99 $27.99 $18.99 $22.99 Save $9.00
  24. Warne Scope Mounts +5 / +4 Extended Base Pad for Glock 19 / 23 - Black
    Warne Scope Mounts +5 / +4 Extended Base Pad for Glock 19 / 23
    $49.99 $29.99 $39.99 Save $20.00
  25. Tyrant Designs Magazine Extension for Glock 19 / 23 Pistols - BLK
    Tyrant Designs Magazine +5 / 4 Extension for Glock 19 / 23 Pistols
    (22)
    $39.99 $33.99 $35.99 Save $6.00
  26. 3 Pack - KRISS Vector Gen 2 10mm +18 Round Magazine Extension Kit (BLK) for Glock Magazines
    KRISS Vector Gen 2 10mm +18 Round Magazine Extension Kit for Glock Magazines 3-Pack
    (13)
    $85.99 $87.99

    Add to Cart to See Price.

    $67.99 Save $20.00
  27. Tyrant Designs 9mm +4 Magazine Extension for Glock 43X / 48 Pistols - BLK
    Tyrant Designs 9mm +4 Magazine Extension for Glock 43X / 48 Pistols
    (17)
    $39.99 $35.99 Save $4.00
  28. 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
  29. Shield Arms +5/+4 Magazine Extension for Glock 19 / 23 Pistols - BLK
    Shield Arms +5/+4 Magazine Extension for Glock 19 / 23 Pistols
    $39.99 $34.99 $35.99 Save $5.00
  33. Strike Industries +5 Aluminum Magazine Extension for Glock 19 Pistols - BLK
    Strike Industries +5 Aluminum Magazine Extension for Glock 19 Pistols
    (4)
    $38.99 $39.99 $36.99 $37.99 Save $3.00
  36. Kel-Tec P11 Black Grip Extension
    Kel-Tec P11 Grip Extension
    (37)
    $7.99
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