Firearm conversion is the process of converting a civilian firearm into a military-style replica while maintaining full compliance with all NFA regulations. While many do-it-yourself kits are available, the best conversions are performed by industry experts with the knowledge, skills, and equipment to deliver a professional upgrade.
At Bahnhof Machine, our HK conversions and attention to detail are among the best in the industry. We pride ourselves on producing authentic-looking, HK-grade military reproductions that look just like the real thing. Plus, we always use HK-branded factory parts to ensure that your HK conversion performs as well as it looks. For HK collectors, this is an important consideration.
For pricing, please click on the HK Conversion you’re interested in, then complete a Service Request Form under Ordering.
- SP89 to MP5K or MP5K-N
- SP5K to MP5K or MP5K-N
- HK91 to G3 or G3K
- HK93 to 33, 33K, or 53
- HK94 to MP5 or MP5-N
- HK94 to MP5-SD
- HK SP5L to MP5-Navy-ST
*Please note that although an HK Conversion will look just like its military-grade counterpart, it will still be a semi-automatic weapon.





