The 3/8" base on a Marlin 795 can be dimensionally inconsistent. Because of this, I would suggest you use a 1 piece base - 3/8" to Weaver.
To be more specific, a BKL-568 1 piece base
. From this permanently attached and more stable surface, you can then use any of the "throw lever", quick detachable 1913 base rings commercially available... such as (for example) the Leupold QRW rings.