Official USPSA Mag Length Gauge
In USPSA competition, it is imperative that you know if your mags are legal length. With competitors trying to eek out every extra round possible in their magazines, sometimes component combinations will put your mags over the legal length. And at a major match is the LAST place you want to find out. You could be moved into Open division, or worse, The official USPSA mag gauge is manufactured exclusively by EGW and is used at all major matches and tournaments. CNC machined out of 6061 aircraft grade aluminum, the gauge is then anodized black. It measures both 140mm (141.25mm) and 170mm (171.25mm) length magazines. The gauge fits all known combinations of magazines and basepads.
Posted by John on Mar 21st 2016
Depressed that it tells me that I can't use the SNL base pads with my mag bodies.
But it's great to know for sure.
It's best to know
Posted by Ernie E. on Mar 7th 2016
Using SNL tool-less base pads ( Dawson ) being new to the game
( Sport ) I need every round I can get into a mag legally
Cause I want to play fair and this is one of the tools to help
give You peace of mind with no guessing