The reason why is, that the CRL on the TK Commander says;<br><br>
Kidney & Posterior Armor<br>
For 501st approval:<br><br>
A separate kidney/butt plate is not allowed - the kidney and butt plate shall be combined/fused to a single plate/one piece.<br>
A white flexible U shaped gasket or molded lip shall be present around all edges.<br>
The crotch tab of the butt plate area may or may not have visible snaps.