8-inch Howitzer M2, carriage M1, mount M 17 and heavy carriage limber M5 : TM 9-335 wo Identification list for ordnance, q.f. 25-pr., marks 2, 2/1, 3, 3/1 & 4 on carriage, 25-pr., mk. 1 with trailer, artillery, no. 27, mk. 1, … Howitzer, 105-mm, M2A1; Carriage, Howitzer, 105-mm, M2A1 and M2A2; Mount, Howitzer, 105-mm, M4 and M4A1 Howitzer, 105-mm, M2A1; Carriage, Howitzer, 105-mm, M2A1 and M2A2 technical manual 105-mm howitzer M2A1, 105-mm howitzer recoil mechanisms M2A1, M2A2, and M2A3, 105-mm howitzer carriages M2A1 and M2A2, and 105-mm howitzer mounts M4 and M4A1 technical manual Operator's Manual (Crew) for Howitzer, Medium, Towed: 155MM, M198 (1025-01-026-6648) technical manual Operator's Manual For Howitzer, Medium, Self-Propelled: 155-MM, M109 (2350-00-440-8811) ; 155-MM, M109A1 (2350-00-485-9662) ; 155-MM, M109A3 (2350-01-031-8851)