Cleaning up the attributes lists in the left-hand column search filters have been a work in progress for months and is nearing completion.
All duplicate attributes such as manufacturers being listed multiple times as Glock, GLOCK, GLCK, and GLK are now directed to one synonym.
This update is one of many that is in the works to improve the searchability of the product catalogs.
You may see discrepancies as the system continues to update and correct the mislabeled attributes. The timeframe for a complete site update will be dependant on how many total products are imported into your site.
**Also please note, that if you have added your own products it may be necessary to update the attributes on those products individually to blend them cohesively with the updates.