Helmet or musketeer

1st: Home; 2nd: by Rembrandt (1642); 3rd: by Lundens (1649); 4th: Three muskets on a rack (extrapolation).

Between Kemp²⁷ and Schoonhoven³⁰, Rembrandt painted an undecorated pot helmet. A face or head isn't visible, so it could be either a helmet placed near the muskets next to the wall, ready for a musketeer to pick them up, or it could be another unknown musketeer holding one of several muskets.
Lundens' smaller sized copy does not provide any insight in this matter.

By making Kemp's head partially transparent, the position of three parallel muskets, intersected by the unknown musketeer's²⁶ musket becomes more clear. If the helmet indeed is of a person, the top musket would logically be his.