HK SP5 9mm

The civilian SP5 is a semi-automatic Heckler & Koch MP5, built on the same Oberndorf line. Roller-delayed blowback with a fluted chamber, paddle magazine release, diopter sights, and a 1/2x28 threaded barrel with a tri-lug adapter for quick-attach suppressors.

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Key Highlights

•Genuine HK production from the same Oberndorf line as the military MP5
•Roller-delayed blowback with a fluted chamber for reliable extraction
•1/2x28 threaded Navy barrel with a tri-lug adapter for quick-attach suppressors

Specifications

Price: $3,679
Weight: 5 lb 14 oz
Calibers: 9mm
Rail Type: polymer
Best For: home defense range training

Capability Profile

0-10 Scale Across 8 Axes

Compatibility Tags

family: pccbarrel: ultra-compactthread: 1/2x28suppressor-mount: hk-3lugmuzzle-interface: coexisting-threadmag-type: mp5

Overview

The HK SP5 is the real thing: a civilian-legal MP5 built on Heckler & Koch's Oberndorf production line, alongside the guns issued to military and police units worldwide. It uses the same roller-delayed blowback system as the select-fire MP5 but ships as a semi-automatic pistol. The roller-delayed action and fluted chamber give it the softest recoil and most reliable extraction in the 9mm carbine class, even when running suppressed or dirty. It keeps the authentic MP5 controls, the ambidextrous paddle magazine release and the Navy-style diopter drum rear sight, and ships with a 1/2x28 threaded Navy barrel plus a tri-lug adapter for HK-pattern quick-attach suppressors. The standard SP5 wears the classic slim handguard with no optic rail from the factory; HK and the aftermarket sell mounting solutions separately.

Key Features

Genuine HK production from the Oberndorf factory in Germany
Roller-delayed blowback action with a fluted chamber
8.86" Navy barrel, 1/2x28 threaded with a tri-lug quick-attach adapter
Ambidextrous HK paddle magazine release and Navy-style diopter sights
Ships with two 30-round MP5 magazines, sling, and case
Accepts standard MP5-pattern 10, 15, and 30-round magazines

Pros

+Genuine HK quality; same Oberndorf MP5 line and roller-delayed system
+Fluted chamber and roller-delayed action give the flattest, most reliable 9mm carbine experience
+1/2x28 threaded muzzle plus a tri-lug adapter for fast suppressor attachment
+Authentic paddle release and diopter sights
+Deep factory and aftermarket support

Cons

−No factory optic rail; mounting an optic requires an aftermarket rail
−Dated MP5 manual of arms: no bolt hold-open, you cannot seat a full magazine on a closed bolt, and the HK charging-handle slap takes practice
−Heavy at 5.9 lbs; modern polymer PCCs like the Springfield Kuna run roughly a pound lighter
−MSRP near $3,679 is roughly 2.5x the Century AP5
−Frequently out of stock; secondary-market prices often exceed MSRP