New Cartridge Developments and Implications for Dismounted Infantry Soldiers

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The LSAT 5.56mm cases are a little less than 0.5" diameter, ~20% fatter than brass cased 5.56 NATO, which would make the height and width of a 30-rd LSAT magazine comparable to a 30-rd 7.62 NATO or .45 ACP magazine. That might be a bit too bulky for some people's taste. (And keep in mind, 6.5mm CT rounds would be even fatter...)

Came across this pic showing 5.56mm and 7.62mm LSAT rounds:


That gives a rough idea of the size that 6.5mm CT ammo would be.