SRU P3 Tactical Helmet Kit (Type III)
Anti-fog and replaceable lens.
Air flow system, including two silence turbo fans.
Resist 6mm  BB velocity of 150 m/s.
A rack mount for GOPRO. Set includes an adaptor for INSTA360 Go2.
Matt Black helmet frame(FDM 3D printed)+transparent Lens.

More details:
The air flow system is driven by 2 silent turbo fans, air flow goes to the lens via air tunnels not to your ears directly. Fan modular is convertible to communication Headset.
We have tested a lot of shooting angle with full auto shooting to the flip- up mask cover button , no safety issue.
Anti-fog coating Lens.
there is no problem for aiming down with a 30mm sights raiser.
Lens is ballistic grade, other 3D printing parts can resist 150m/s velocity with 0.2g at 5 meter distance.
all parts are modular design, SRU will prepare sufficient aftermarket parts.