Semi-automatic-only versions—the HK94 with a 16.54" barrel and either an A2 or A3 stock, as well as SP89 and SP89K pistol versions were made for the U.S. civilian market: briefly even a .22 LR ...

To use a buttstock and be considered a non-NFA rifle, a firearm must have at least a 16” barrel. For MP5-type firearms, originally designed as compact submachine guns with an 8.9” barrel, this ...

The MP5SD SpecOps Integrally Suppressed Barrel is a superb barrel option for the MP5. It has an integrated suppressor that keeps you off the radar, boosts damage range and bullet velocity, ...

Kit Up: The HK MP5 SD. ... Due to its ported barrel, it does not require use of subsonic ammunition for effective sound reduction like most conventional sound suppressed submachine guns.