Arcane Blaster

The arcane blaster is a arcane focus for an artificer.

The arcane blaster can also be used as a ranged weapon: d6 force damage, Range 90/300, can use intelligence instead of dexterity. 

The arcane blaster can used by a non spellcaster and use magic shells to cast artificer spells. The attack modifier or DC of the shell will be affected by the crafter. 
The Arcane blaster can hold 3 magic shells in his chambers, reloading takes 1 minute and two hands. 

Supercharge. You can cast a shell spell with a casting a time of one action as a bonus action. The shell must be already loaded in the Blaster.
After casting the spell, roll a d6. On a 1, the supercharge released too much energy and short-circuited the Blaster. It is considered damaged and has a -1 to attack rolls and spell save DC until repaired (this -1 stacks if the Blaster short-circuits again while damaged). The Blaster can be repaired with 1 hour of work with access to a workshop and materials.
Make a Smith's Tools check: the result of the check will determine the cost of materials used to repair it. 

Shells can be crafted:

Notes: Ignore Weapon Property: Two-Handed, Replace Damage Type: Force