3 out of 3 people found the following review helpful
After reading the first review I purchased the Magaziine extension and spring for my PX4 Compact 9mm. I tried it both ways, with the longer spring and the original spring, it works both ways but the original spring allows the 18th rd to be installed with ease; it gives you a spare spring as well, win-win. I also agree with the other reviewer that it looks real cool as well! I recommend it.
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