Threaded Barrel – .578 X 28 – HK45 – RCM

(2 customer reviews)


HK45, HK45 Tactical Threaded Barrel .578 X 28 – RCM

US made HK45 & HK45 Tactical threaded barrel for use with a wide variety of flash hiders & sound suppressors. This is a special offering as a factory HK45 Tactical barrel is threaded metric 16 X 1 left hand (not as common) as the US threaded offerings. This offering is for an HK45 & HK45 Tactical barrel with US .578-28 threads. A much more common thread pattern when looking for suppressor and flash hider offerings. A great combo package at a great price!

  • HK45 Tactical threaded barrel- US made by RCM
  • Custom crown protecting thread protector included & installed
  • HK factory O-ring included & installed
  • This barrel is a true drop in direct replacement for all HK45 Full size pistols
  • Includes the o-ring and thread protector to protect your valuable HK45 pistol

Each HK45 barrel features:

  • 100% US Made entirely of fully heat treated 4140R steel
  • Double Stress relieved
  • Nitrided Finish to entire surface of barrel inside and out
  • 1:16 twist
  • 5.15″ Overall length & 5.20″ with thread protector installed
  • Threaded .578 X 28 – Right Hand
  • Austempered & finished inside & out in an ultra durable nitride hardening process
  • Each barrel is chambered in .45 ACP with a polished feed ramp
  • Each barrel comes complete with thread protector & HK green o-ring

Please note: This barrel is NOT the same barrel for the USP45 this barrel will fit HK’s new HK45 & HK45 Tactical pistols only.

  • Condition: New
  • Origin: USA
  • Section: Pistol Slide Parts
  • Brand: RCM
  • Type: Barrels
  • Caliber: 45 ACP

In stock

SKU: HKP-17446

Additional information

Weight 5 oz

Share your thoughts!

5 out of 5 stars

2 reviews

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What others are saying

  1. Sluggo

    Buy with Confidence

    Sluggo (verified owner)

    Just put my first 100 rounds through this new barrel, and I couldn’t be more pleased. I wanted a US standard .578 x 28 threaded barrel when converting my HK45 to a suppressor host. Yes, the new barrel dropped right-in. No, it didn’t need any gun-smithing. Your mileage may vary. The .578 x 28 thread pitch is very well-machined, and spares me from having to purchase a differently-threaded suppressor piston (i.e. My 1911 is also threaded at .578 x 28). Thread protector is included. Green o-ring is included. Alles ist klar, Herr Kommissar.

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  2. Jesus Rodriguez


    Jesus Rodriguez (verified owner)

    Fit perfectly, no need for smithing. Works like a GD charm 🙂

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