you ever look at kel tecs pocket pistols? they are about the same size as most derringers ive seen or used but hold 7 rounds in the mag in their 32 acp design and 6 in the mag in their 380 and 9mm configuration. they are much lighter in wieght then any derringer ive held too. as for derringers i have not seen any manufacturers punching out derringers in about 10 years other then texas deffender.