>>64172511
>M855
The velocity is uncertain, I agree it's probably out of an ARP or something to get it below 2,500ft/s. You aren't cracking most steel armor with that. However, that's still a marked improvement over other facial armor. Still unacceptably heavy though.
>CX800
In another win for Tencate's naming conventions, I meant the CXP-800, not the CX-800. The CXP-800 is a standalone 5.39lb plate rated to both Level III and IV. It has double the multi hit of the 4801.
>REV. C
FQ/PD 07-03 Revision D outlines XSAPI REV. C, IIRC.
>VTP
Those are meant to be 5.4lb or so, standalone, 58mm BFD limit, swimmer cut. Otherwise same or better ballistic performance as prior XSAPIs. VTP ESAPIs are below 5lb. You can see why the XSAPIs are going to have trouble.