D54 A1 Pistol

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  • Properly rolled and welded upper receiver with the finest attention to detail
  • Integral receiver top 1913 picatinny rail
  • Free-floating 16-flute cold hammer forged 3-lug barrel
  • Tungsten filled sear-ready bolt group
  • Anti-rattle magazine release
  • DTAC Modular Handguard System featuring 11 full and 5 half length M-LOK slots
  • SEF Navy-style semi-auto trigger group (A1/A2/A3)
  • Ambidextrous semi-auto trigger group with left-side ESSL (A4)
  • 30 round steel curved detachable magazine
  • A1 endcap with sling swivel (pistol) or A2/A3/A4 stock (SBR)
  • Sights: Rear rotary drum; Front hooded post
  • Fully parkerized with HK Black Duracoat final finish
  • SSR™ Technology


  • Caliber: 9mm x 19 Parabellum
  • Barrel length: 8.85″
  • Barrel twist: 1:10 with 6 right-hand grooves
  • Operation: Semi-automatic roller-delayed blowback