I have the shelf, but the stated max weight is 10 lb, so I place a small ammo bag on the shelf (or leave an ammo can within the main compartment of the cart).

The shelf is raised up so you can use it with the umbrella holder in place.

Printed in PETG to withstand outdoor temperatures.

Update (May 7, 2026): I had feedback from some local shooters who managed to break their mag shelves; One tipped his S3 cart over and the shelf snapped and the other was loading Open big stick mags and the force to load the last round broke the shelf.

To attempt to remedy this, I beefed up the mag shelf (ZucaHandleMagShelf - 260427) and now print them in PCTG instead of PETG.

Update (May 8, 2026):  By request, I've added a version that has a 1" RAM ball mount (B size).  I also chamfered the bottom of the post to minimize post-processing (and elephant foot compensation).

Printables Tags: ipsc; uspsa; uplula; s3; zuca; scsa