Manufacturer: Pearce PG-39
Pearce Plus Grip Extension for GLOCK 26, 27, 33, and 39 Black
These units replace the magazine base plate and internal floor plate. They will add three rounds to the GLOCK M26, two rounds to the GLOCK M27 and M33 and one round to the GLOCK M39. These units will add 1" additional length for better control and comfort.