#97 390 12ga Carrier
#98 390/391 Carrier lever
#99 390/391 Carrier lever spring
#100 390/391 carrier lever spring plunger
#101 390/391 Carrier rivet
This is the part used to correct some of the 391 12ga failure to feed issues,if you have any questions about this, please call for more details.These are mass produced parts and may require fitting to your firearm.
Note: It is recommended that all Beretta parts be installed by a qualified and trained gunsmith.