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Good morning to you!! Here's a breakdown: GLOCK 21: The model of the pistol, a full-size, polymer-framed handgun manufactured by Glock. HGA: While not a standard Glock term, it may indicate a custom grip modification or a specific variant, according to gun forums. .45 ACP: The cartridge the pistol is chambered for, a popular and powerful handgun round. 4.6 FS: Indicates a 4.6-inch barrel and "FS" stands for "Front Serrations" on the slide. 5#: Refers to a 5-pound trigger pull weight. 3 13RD MAGS: The pistol comes with three 13-round magazines. Hopes this helps. Have a good rest of your weekend.

Hi Todd and welcome. In summary: An "HGA" designation on a Glock pistol is not a standard Glock model, but rather a distributor-specific label used to identify a particular configuration or feature set of a Glock pistol offered by a specific retailer. Example here (reduced dimensions): https://heroquartermasters.com/product/web-glock-19-g19-hga-9mm-4-0-bbl-fs-5-2-10rd/ ----------------- FS = Fixed Sights and 5# = 5lb trigger pull weight. Cheers, stay safe and enjoy!

"HGA" is likely a distributor or manufacturer code, not an official Glock designation, and often indicates a two-tone color scheme or a specific configuration, like front slide serrations. For example, a Glock 19 HGA might have a black slide and a different color frame, or it could include features like front slide serrations or a specific trigger weight. "FS" = Front Serrations on the slide

Hi Todd, The HGA is something that came from a vendor's system - they use it to designate items as handguns - it doesn't mean anything as far as the gun itself. 4.6 is barrel length. FS is fixed sights, (this gun does not have front serrations) 5# is 5.5lb trigger pull. Stay safe & have a great day!