According to information available in the Internet, the WOT will soon hand over 1412 MSBS Grot carbines in the C16 FB-M1 version to the operational forces.

They will be sent to three brigades: the 21st Podhale Rifle Brigade, the 6th Airborne Brigade and the 25th Air Cavalry Brigade. The above-mentioned GROTs will be the first ones to enter service with operational troops, not counting the ones used in research and training centers and those transferred to the representative subunits in the modified MSBS-R version.

The weapons are brand new and it is the M1 version (also known as A1) that is, models modified, taking into account WOT operational experience.

Sources: defence24.pl, wikipedia.org,fabrykabroni.pl