MBX "Mega 57" 21 Round Glock Magazine Extension Basepad w/ Spring, Red - 6203
- Caliber: 9mm
- Capacity: 21 Rounds
- Finish: Red
- Spring: 28 Coil MBX Custom Spring
The MBX Mega extension has been a very popular product used on the Glock style 31 round tube but has also seen use on a Glock style 17rd short tubes. This gives the user options of capacity and overall length to suit their personal liking. When used on a short 17rd tube, it gives you 43 rounds.
MBX has engraved capacity witness lines and reference numbers for both short and long tubes. It comes with a 28-coil spring so you can use it in both short and long tubes.
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