Did you check the manual?
http://www.redleg2scale.com/RBMI%20Info/13774835-Howitzer-Medium-Towed-m198.pdf
"NOTE Ramming at low gun elevations will be done using two 4-foot (1.22-m) cleaning staff sections. If the gun is elevated to the extent that two staff sections cause interference with the ground, one staff section may be removed and replaced with a 2-foot (0.61-m) staff section. Do not use only a single staff section"
Eight four foot staffs and one two foot staff are part of the Basic Issue Items:
"46 1025-00-563-7232 STAFF SECTION, CLEANING, ARTILLERY (4-FOOT) (19206) 7309228
EA 8
47 1025-01-044-2587 STAFF SECTION, CLEANING, ARTILLERY (2-FOOT) (19206) 11579227
EA 1"
Regards,