is the only difference where its notched because id like to get some 34 rds

Uzi mags and Colt mags are similar in the exterior dimension.

The Colt mag uses the std AR/M16 mag catch to hold mag.
Colt mag has provision to hold bolt open, provided mag block is equipped with hold open tab.

Uzi mag catch on the Uzi is near the bottom of the Uzi magwell, so no "lockie" in AR unless you duplicate a catch in the mag body.
Uzi mag and Uzi have no provision for bolt hold open.

ok i just wanted to make sure the feed rails werent changed at all


thanks for your help in both my post