RV-10 single pilot reported an NMAC event during final landing with an intruding Helicopter. The RV-10 single pilot took evasive maneuver and was able to land safely.

Narrative

At XA:20; Day 0; a black hawk helicopter crossed directly at the final for Runway XX with multiple active GA traffic operating at the airport ZZZ. The helicopter departed ZZZ1 and was traveling north before turning east to cross the final at around 300 feet AGL. I approached the airport from the north west crossed midfield; turn left downwind then base and final. I was aware of the helicopter when approaching the airport and turning midfield but list awareness there after. I had assumed the helicopter continued north.During all phases of flight I was communicating on XXX.X.After turning on final and with 1/4 mile of the end of runway as I selected a touch down location the helicopter entered from the west directly in-front of me. I banked right and called out on frequency about the traffic. I was able to land with corrections.There was an aircraft sitting waiting to depart that observed the near accident. Shortly after they departed a group of 4 helicopters were passing south of the airport from ZZZ1 and turned north back to our airport forcing departing traffic to maneuver.The actions of the first helicopter were beyond dangerous. They were near criminal. It was not a lapse in judgement. There is no way he could not see; know or understand there was an active airport. He was not using communication nor any type of traffic in what is a very busy area.