Beretta 21A IWB Kydex Holster for concealed carry Our inside the waistband holster for the Beretta 21A IWB Holster for the hard to find subcompacts.  This holster offers Adjustable retention and a straight draw cant.  The muzzle end is flared open to allow for models with a threaded barrel. Available today. Fast shipping. Follow our Blog for more EDC Tips and Techniques.