MP-4B-F3
The MP-4-F3 discharges 3 foam rubber batons. The 17 gram batons are made of 30 durometer foam. 
For direct fire.

MP-4-R3
The MP-4-R3 discharges 3 hard rubber batons. The hard rubber batons are an effective replacement for wood batons, without the danger of splintering. These cartridges are designed to be skip fired. 

MP-6-F4
The MP-4-F4 discharges 4 foam rubber batons. The 17 gram batons are made of 30 durometer foam. 
For direct fire.

MP-6-R4
The MP-6-R4 discharges 4 hard rubber batons. The hard rubber batons are an effective replacement for wood batons, without the danger of splintering. These cartridges are designed to be skip fired.