Originally Posted by Ben.haK
I hope you realize making a bolt with a different material will not make the marker more or less efficient.
If the material it is made out of is lighter than it will make a difference since it takes less gas to push the hammer and bolt back. Since the Overlords bolt is made of delrin, which is lighter than aluminum, then it uses less gas.
I have an ACP 2.0 and I have upgraded to both a delrin bolt and delrin sleeved striker from Alamo City Paintball. It has increased my efficiency greatly, has made it more quiet and also, I dont have to use as much marker oil since the delrin soaks it up an just seeps oil. I like the ACP a lot but I cant really compare it to the Overlord as I have never held one. I do like that I can put my spider barrels on it and also I can use the rail in front of the trigger guard to mount whatever. Hope this helps.