Glock magazine base +3
Glock magazine base +3 is backordered and will ship as soon as it is back in stock.
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Arredondo +3 magazine bases for Glock magazines
The two-piece magazine base from Arredondo increases the cartridge capacity of Glock magazines by up to three rounds. The included Wolff spring, which is 10% stronger, maintains the familiar Glock reliability.
If a low sight is mounted on the Glock, it will still fit into the IPSC standard box even with these magazine bases!