The "one size" basepad fits all calibers and lengths
MBX IPSC/IDPA Angled Basepad Box Rule for STI/SV and all 2011 styles tubes
MBX Angled Basepad is designed to work with the standard STI/SVI and all style pistol magwell other magwells require fitting/adjusting to clear basepad and typically there is a loss of 1 round
tool-less removal
Billet Aluminum material
May need to be modified if used on other manufacturers tubes.
for true 140mm:
1.25mm shorter the MBX Standard Magazine Basepad
In compliance to meet the IPSC 140mm Magazine Length rules