The Strike Industries GEN4 Magwell for GLOCK 17 was designed to provide easier reloading of the magazine while adding SI styling. Keeping to the slender factory design of the pistol grip, the benefit of adding a funnel-like magwell to help prevent the dreaded reload bobble outweighs the added material of this G4 Magwell. Add consistency and cut fractions of seconds off your reloads now with the Strike Industries GEN4 Magwell while comfortably carrying your pistol on your hip or in your waistband. Compatible with most aftermarket magazine base plates and extensions as well as for GLOCK G22 / G31 / G34 / G35 models.