44US magazine ID

[carbineer]

Magazines for the 44US series and the 140 are two different animals. They have similar shapes and will fit the other rifle but the locking system is totally different. The lock on the 44US mag is on the mag itself and the 140 lock is part of the action. The mag you pictured is for the 140 and the one that Jonzie posted is for the 44Us series.
Attachment 92356Attachment 92357
Side by side top is 44US series bottom is 140
Hope this helps