The BX-1-CLR is the clear version of the Ruger factory ten round magazine for the 10/22 family of rifles.
Made for the Ruger 50 year anniversary they were so popular they are now a standard item. Please note that the clear acrylic they are made from won't take quite as much abuse as the standard black magazines, not a problem for most people but if you regularly dump mags on concrete floors for gallery rifle please be aware they will scuff.
Ruger's compact and reliable rotary magazine design is the main reason why the Ruger 10/22 is the world's most popular rimfire rifle, with a whole industry of aftermarket parts based around one magazine.
You can’t go wrong with having extra magazines, whether it’s for fast loading at the range or in the field. Or, as a backup in case of loss, damage or muddy puddle encounters.