[null and void]

depleted U round can do this, but odd it did not spall. Perhaps due to the nature of the Chobham armour

IIRC, the inside of the M1A1 is lined with kevlar matting to absorb spall. I note that the pictures show everything BUT the inside surfaces of the armor...

[Blueflag]

Based on reading the thread and your answer AND the "scratching the back" comment in another post, I'll go with a blue on blue from long range.

"Gunner, SABOT, ATGM . . .Identified. . .FIRE . . . On the Way . . . BOOM . . . Target! cease fire ceasefire! oh SH....."