Heavy Padding
From AmtWiki
The following is an official clarification found here: [Heavy Padding Clarification]
This refers to portions of the weapon that meet all of the requirements of Strike-Legal, but has at least a 4” cross section from edge to edge (instead of 2.5"), with all other Strike-Legal requirements intact. It is considered Strike-Legal for the purposes of scoring hits.
See Also:
Strike-Legal
Padding