Glock 20 / 21 IWB Holster Gen 2 and Gen 4
Glock 20 / 21 Pistol IWB Holster. Gen 4 compatible. This full size IWB holster is ideal for AIWB Carry right up front. User adjustable retention. Positive Click when holstering to let you know the pistol is positively seated in the holster.