$4 flush 10 round AR-15 mag

[MoBoost]

Here is the contraption I mad from "Master Molder" 20 round mag. Still holds 10 rounds. Works great as "benchrest follower" for them feisty 80 grainers.
Belt sander and some welding rod.

 

[NikatKimber]

How does it feed? I'd be curious to try if it works well. Could be easy to make into one of the stupid 7rd limited cap mags for hunting.

 

[MoBoost]

Feeds fine. It'll be easy to make 7 round stop with another rod in the middle.