== [[Maze Customs]] ==
This weapon can receive the following minor customization services:
* ''Total weapon conversion: '''Vollmer HK51-B'''* '''HK21 Tactical' ''
=== ''Vollmer HK51-B'' ===
''Full article: [[Vollmer HK51-B]]''
=== HK21 Tactical ===
''The HK21 deserves the modern tacticool love, too. This update package installs a retractable [[M4]]-style stock and a quad-rail system, comprised of a tri-rail on the handguard and an HK claw-to-NATO rail adapter, allowing you to use more common optics. Note that the rails will remove the integrated bipod.''
Cost: [[File:Parallar symbol.png|10px]]'''500'''
Modifications:
* Stock type: Becomes '''Retractable (RS)'''
* Optics: Becomes '''NATO mount'''
* Lights: Becomes '''2x Long interface'''
* Underbarrel: Becomes '''Long interface'''
[[Category:Class 1 weapons]]