How do you measure MBX tube length?

[igolfat8]

I have MBX magazines that came with my Atlas Titan. Where do you measure the magazine to determine its length? Do you measure with or without base pad? Do you measure from base to case head end or bullet nose end?

 

I also need to know if I have gen 1 or 2 tubes. I watched the MBX video but its very difficult to tell in the video how to determine the difference between the two tubes. Adriann talks about the indent in the tube but the video doesn't show a clear image of what he is talking about.

 

Edited January 22, 2018 by igolfat8

[shooterDrew]

Here is a pic of how a mag gauge measures overall length. You measure with basepad on and from the top back of the feed lips to the bottom of the basepad. All of my MBX mags fit the gauge without issue.

[igolfat8]

Thanks for posting that picture. Would it be safe to say that I have 140mm magazines?

[Mountbkr]

Based on your picture, yes

Edited January 22, 2018 by Mountbkr

[Mountbkr]

2 hours ago, igolfat8 said:

Thanks for posting that picture. Would it be safe to say that I have 140mm magazines?

 

Based on your picture, yes

[Bkreutz]

They look like 155 mags to me, based on the ruler you have next to them.

[Mikeski]

If they were 155 mags, they will say 155mm on the mag.