About 5KU: 5KU is an overseas airsoft parts and upgrades manufacturer specializing in creating precision machined internal gearbox parts, as well as gas blowback components. 5KUâ€™s internal gearbox components are constructed to strict tolerances, ensuring perfect fitment in all compatible airsoft gearboxes. All of 5KUâ€™s internal gearbox upgrade components greatly improve the performance of your stock airsoft gun. Airsoft Megastore offers 5KU parts and accessories for the LOWEST price on the market!
1X Free-Float M-LOK Rail
|Compatibility||HK416 Series AEGs|
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