Add some real firepower to your Ruger 94 40 Cal gun with this 20rd 40 cal gun magazine from Promag. This gun mag will load and feed smoothly and reliably. Gunclip Depot has the largest selection of Ruger gun magazines and gun clips. If you do not see the gun magazine you are looking for send us an email and we will try to locate it for you. Buy your gun magazines and gun clips at gunclip depot.