Firearm Magazine Extender Market Value
Analysis of 2,039 listings for firearm magazine extenders to determine current market pricing.
What you'll usually pay
💡 Used ones cost about 17% more here.
👉 In short easy summary
The best value is found in polymer materials and CZ-compatible extenders, both seeing a 21% decrease from the median. Conversely, Parkerized Steel and Purple finishes command the highest premiums, with deltas of 114% and 79% respectively.
💚 Best value for your money
Price by number of rounds
Why? Price scales with capacity, ranging from 14.99 for 2 rounds to 33.44 for 8 rounds.
Price by color
Why? Standard black is the cheapest at 18.99, while specialty purple finishes reach 37.47.
Price by for gun make
Why? Pricing varies by brand compatibility, with CZ at 16.49 and SIG SAUER at 32.99.
Price by material
Why? Polymer is the most affordable at 16.6, while Parkerized Steel is the most expensive at 45.
🛒 Some on sale right now
Common questions
What is the median price for a new magazine extender?
The median price for new units is 20.99.
Which material offers the lowest price point?
Polymer extenders have the lowest median price at 16.6.
How do GLOCK compatible extenders compare to the market median?
GLOCK compatible extenders have a median price of 25.49, which is 21% above the market median.
How we got these numbers
Worked out from 200 live eBay listings (price range $10–$48, odd outliers ignored). These are asking prices, so use them as a guide. Last checked July 8, 2026.