This Smith & Wesson extension adds 6 rounds to your magazine. Easy assembly. Made to match our S & W magwell. Works on All double stack M&P Mags 9mm and 40. If you do have a .40 it will only be a +5 extension.
Stock Spring is all you need.
Black hard anodized aluminum. Color anodize will vary with each batch
*CAUTION* Our bases and extensions WILL have problems when dropped repeatedly on concrete. They are Hard Anodized, but they are still aluminum parts that will take on damage. When installing the extensions, only tighten the back plates down until secure. The plate may crack or break if tightened down too much.
MADE IN THE USA
KNOW YOUR STATE AND LOCAL LAWS
Installation Instructions
Please View the youtube video at:
https://www.youtube.com/watch?v=TUEIX6JqDQU&t=4s
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4.5