In a tiny apartment you have the very real aspect of any misses potentially hitting your neighbors.
I am living in an apartment 4 nights a week because of my job and I went with a Mossberg Shockwave with the Aguila mini buckshot( you need to install a $17 adapter that takes about 3 seconds to install to let the gun feed the mini shells)
8+1 buckshot in a package that goes in and out of the apartment in a backpack.
Also have my G19 with me for EDC.
I am living in an apartment 4 nights a week because of my job and I went with a Mossberg Shockwave with the Aguila mini buckshot( you need to install a $17 adapter that takes about 3 seconds to install to let the gun feed the mini shells)
8+1 buckshot in a package that goes in and out of the apartment in a backpack.
Also have my G19 with me for EDC.