Yes Nicholas, the UPC 4806015571131 is for the Rock Island Armory (RIA) STK100 Ultra HC, not the original STK100. The "Ultra" is the significantly updated model you are referring to as the "Gen 2," and it was redesigned to address many of the issues found in the earlier version.
The Armscor STK100 is a striker-fired pistol with a 1911-style grip angle, while the STK100 Ultra is a significant redesign (Gen 2) featuring an integrated flared magwell, a flat-face trigger, suppressor-height sights, deeper checkering for improved grip, and a larger optic footprint for greater red dot sight compatibility. The Ultra's improvements focus on enhanced control, comfort, and aftermarket integration compared to the original STK100.
Hope the above information helps Sir Nicholas, please take care and stay safe 🙏🏻

Good evening to you!! The STK100 Ultra HC is the new and improved model of the STL100. The Ultra HC fixes the issues that plagued the first generation of the STK100. I hope this helps. Have a good rest of your day.
🇺🇸🇺🇸 'Merica' 🇺🇸🇺🇸

Def a case of an incorrect description. Use the upc code to see what you’re getting. Bud's has been made aware.

Hi Nicholas and welcome. You are correct that upc 4806015571131 is for the Gen 2 Rock Island Armory (RIA) STK100 Ultra HC. It contains the upgrades and improvements that corrected the problems that the original STK100 was plagued with. Great price on magazines available here: - https://outdoorlimited.com/armscor-rock-island-stk100-9mm-magazine-17-rounder-stk10017/ -- Cheers, stay safe and enjoy!

Hi Nicholas, yes sir, the upc 4806015571131, which is model 57113, is for the STK100 Ultra HC.
The Standard STK 100 is upc 4806015571247, model 57124.
The STK100 Ultra is an upgraded version of the original STK100, featuring enhancements like more aggressive grip panels, flat-face trigger, suppressor-height sights, and an integrated magwell for improved control and comfort. Both models are striker-fired pistols, but the Ultra offers a more premium feel and better performance for shooters.
Always check the upc code before buying to be sure the picture & description match.
The correct picture can be seen here >>> cobratactical.com/products/rock-island-57113-4806015571131-6075
Stay safe & have a great day!

This is just a case of an incorrect description with this listing. Always go by the upc to see what you'll really get. A correction has been submitted to Bud's.