We have used many True Precision barrels on our R&D handguns over the years and have seen nothing short of quality. We have added these to our collection of top tier products we recommend to customers searching for the best products in the industry. This barrel is for the standard 3.1" HELLCAT NOT the HELLCAT PRO. This barrel has 1/2-28 threads.  Hellcat Threaded models also include a notch so you can use your Springfield RDP compensator as well! Easy to install drop-in design for the Hellcat 3.1" 9mm. Will NOT work with Hellcat PRO (available Feb 2023).  Threaded barrel length is 3.85" overall (without thread protector attached). Does include notch for RDP Comp. Will work with most aftermarket mini and micro comps in 1/2x28.  Advanced proprietary broach cut design specifically engineered for increased accuracy potential. Broach cut 6 groove rifling allows for all ammo types to be used safely, including cast lead. 100% Designed and manufactured in the USA with USA sourced certified 416R stainless steel. 9mm 1/10RH twist rifling. Target crown for non-threaded versions or 1/2x28 threads with included thread protector on threaded versions. Threaded versions include Viton high heat integral O-ring lock thread protector. SAAMI spec chamber. Improved overall fit from OEM with added chamfers, improved radius cuts, and other additions for a better than OEM barrel. Assorted specialty coatings and finishes to choose from. Lifetime performance warranty on function.