Mossberg magazine plug

[cam1936]

Ugggghhhhh somehow lost my magazine plug for my Mossberg 500. Waterfowl season starts today and I don't want to have to use my defender!

Does anyone know how long the factory dowel is and whether it is 1/4" or 1/8" dowel?

 

[Lodi]

9" long, 1/4" diameter.

An "O"-ring on each end to help keep it from falling out.