Good value mag extensions - TRYBE Defense Glock 19 +4/5 Rounds Magazine Extension Base Pad

Bought 3 on sale, well constructed with nice features for the money, trap door for spring access/maintenance, locking pin from the extension backing out, textured sides for grip. Extra power spring seems to a good spring weight to make up for additional length.

FYI, these will NOT fit in a USPSA mag gauge using OEM 17 round magazines, they measure closer to 146mm in length. The trap door feature on the bottom puts them out of spec, no easy way of modification without ruining the machined tongue and groove of the door.