yoni73Selling a HK UMP SBR set up as a full multi-caliber package. This is a turnkey setup — everything needed to run both .45 ACP and 9mm without sourcing hard-to-find parts. If you’ve been looking for a properly outfitted UMP, this saves you the time and expense of piecing one together. Included: ✅ .45 ACP bolt ✅ (2) .45 ACP barrels • threaded • non-threaded ✅ 9mm bolt ✅ threaded 9mm barrel ✅ (4) magazines total • 2× .45 ACP • 2× 9mm Details: • Currently on a Form 3 at my FFL • Ready to ship to your dealer once approved • Clean, complete package — no chasing parts later • Ideal for collector or shooter wanting caliber flexibility
