RE: Beretta Pintail/ ES 100 Problem. Please help if you can
You may want to clean the recoil assembly in the stock. After you clean it just lightly lube the spring to prevent rust. Use a good synthetic oli like CLP, FP-10, or Militec.
The Beretta Pintail/ES100 is a renamed Benelli SL series. Pretty much the same as the newer Beneli's without a rotary bolt face or cartridge release lever. There were three different Beretta Inertia operated models, the 1200 and 1201 were the other two.