Ark Liu reviews four different Glock gas blowback airsoft pistols. He introduces two modified Glocks: a Marui G17 with Agency Arms RM slide and a VFC Mark27 Model 2 based on an early VFC G19 Gen 4 with a TX Force slide kit. Arc Liu then presents two other models: a WE G19 Gen 5 MOS, the most affordable but requiring DLC for full customization and having minor quality issues with the sights (though upgraded by Military Shop with reinforced parts), and an Umarex G17 Gen 5 MOS made by SRC, praised for its build quality and compatibility with VFC magazines. A G19 Gen 5 MOS version from Umarex is expected soon.