Found these 4 black mags at the last gunshow. Comparing them they look to be an exact match except the blocked off square area where the palm tree should be

Top 2 pics. The FDE  and RIGHT black mags are US Palm

Last 2 compare the tops & bottoms. The left mag is US Palm.

Tried all 4 unknowns for fit in an early Bulgarian and Romanian SAR1. Both felt tight no wobble. Loaded 5 rds i each then hamd cycled. All rounds feed and extracted

Will try to get to the range this week but no promises due to the holidays.

Am curious if anyone knows anything about these?

They look like someone sanitized the US PALM logo, and the definitely aren't XTECH.

Look like US Palm.

That square is where they cut the logo out, probably changed to an insert on the mold for repair, debranding, rebranding, etc. Could be a geometry change/repair on whatever those recesses do and they decided to debrand for whatever reason.

Interesting. The guys at AKOU had Post US Palm production Tangodown AK grips as well. Hopefully, somebody someone has picked the production up where Palm left off.

XTECH mags have a removable floorplate.  Century is supposed to have taken up the US Palm brand.