SELF-COMPENSATING SHOCK ABSORBER
The Bernardelli 20ga semiautomatic shotgun is built in the same way as the 12ga semiautomatic. It is a gas-operated autoloader featuring some dedicated 20-ga components next to other components common to the caliber 12. Just like the 12ga, the 20ga comes with a 2-position piston assy ((LIGHT and HEAVY) but also with a self-regulating device to automatically switch between light and heavy loads.
The semiautomatic features a SELF-COMPENSATING SHOCK ABSORBER positioned between the PISTON and the COCKING ROD SUPPORT. It consists of an elastomer sandwiched between two rings in light alloy whose shouldering effect is directly proportionate to the strength of the load. The technical features of the elastomer and the anodized rings guarantee excellent wear and corrosion resistance. It is, therefore, no longer necessary to switch the PISTON position based on the loads being fired.