Means that it has been changed in some way from the regular version.
It stands for Modified choke.
Browning Choke Markings "* " = full "*- " = improved modified "** " = modified "**-" = improved cylinder "**$" = skeet "***" = cylinder
# They relate to choke type, i.e., full, modified....
Modified.
* Full *- Improved Modified ** Modified **- Improved Cylinder **$ Skeet *** Cylinder Bore
modified
.020
from smallest pattern to largest: full improved modified modified improved cylinder cylinder (no choke)
modified style
Yes: A Remington 870 shotgun with a modified choke will shoot any commercial shotgun slug.
M=MODIFIED IC=IMPROVED CYLINDER S=SKEET F=FULL Also, as stamped on receiver: * Full *- Improved Modified ** Modified **- Improved Cylinder **$ Skeet *** Cylinder Bore
The modified choke could be the control