which of these parts can be found in both pistols and rifles?\no barrel stamp\no stock\no pump action\no choke

which of these parts can be found in both pistols and rifles?\no barrel stamp\no stock\no pump action\no choke
Answer
Brief Explanations:
A barrel stamp is a marking on the barrel of firearms and is present in both pistols and rifles. A stock is mainly for rifles to be braced against the shoulder. Pump - action is more common in shotguns. A choke is used in shotguns to control the spread of shot.
Answer:
Barrel stamp