BIT GAS BLOCK VENT SCREW HK416 A5 MR556 A4 FELO 🇩🇪March 4, 2025
FELO bit for Heckler & Koch HK416 A5 and MR556 A4 gas block vent screws.
When you remove an MR556 A4 gas block vent screw for the very first time you will need to use a bit like this one, the screw is going to be very tight and it will make a loud pop when it releases.
Tip size: T20
Length: 25mm
1/4″ Hex Drive
Made In Germany








