I have the Naval Aviation listing for the Pistol Grip CO2 Kidde extinguishers here ( denoted by the "R" prefix)
2.36lbs, 16" long, total weight 8.9lbs, model 2TA, part no 26295, stock code R58-E-205
3.62lbs, 20 3/16" long, total weight 13.5lbs, model 4TB, part no 93138, stock code R58-E-211-22
5 lbs, 15 7/8" long, total weight 16.3lbs, model 5TA, part no 92755, stock code R58-E-207
7lbs 4oz, 20 3/8" long, total weight 22.2lbs, model 7TA, part no 92508, stock code R58-E-210
Spec M106C, Walter Kidde and Company
the 15lb CO2 capacity unit weighs 55lbs total, and stock code is 58-E-194, but it doesn't specify a manufacturer. My "4lb"Kidde unit meets the details of the R58-E-211-22 above