The act of firing the gun should unlock the bolt, however, as in the case of Remington's 870 a slight forward movement of the forearm should be required to complete the unlocking of the action. this is accomplished during firing by the recoil of the gun which is why we don't really think about it.
Remington 870's and mossberg 500's with both fail to cycle until a slight forward pressure is put on the bolt/fore end.
Remington 870's and mossberg 500's with both fail to cycle until a slight forward pressure is put on the bolt/fore end.



























