It has a modular construction allowing for easy replacement of components and changing between barrels with different chamberings.

Some differences are that the 404 has a manual cocking lever instead of a push button safety like on the 202.

This is essentially a 5 mm hex key integrated into the front sling swivel stud, and can be used to disassemble the forend, buttstock, switch barrels or adjust the trigger.

The trigger weight can be adjusted by the user after the forend has been removed using the included Sauer universal tool or a 5 mm hex key.

[4] To disassemble the barrel, the forend must first be removed by unscrewing one screw with either a 5 mm hex key or the Sauer universal tool.