The photograph is a 5-round magazine. - Sds Imports Magazine 12ga 10rd 2-3/4" Lynx/cheetah/saiga 12

A 5-round magazine is pictured in this ad for a 10-rd magazine. I am holding a 5-rd mag in my hand next to the photograph on the screen and they match exactly.

I haven't used the magazine yet, but it looks rugged and fits the gun well. Goes into mag well with no problem, releases well also.