The magazine base plates will fit original Glock 2-row magazines in “normal size” calibers:
9x19mm, .40 S&W, .357 SIG etc. e.g. for the Glock 17/34/21…
Best printed in something rigid, if you plan to use it for dynamic shooting. I've printed mine in Prusament PETG CF, but probably normal PETG will do.
The author marked this model as their own original creation.