How does the Echo1 Genesis OCW AEG perform in the field? Team Blacksheep's The Flea does the honour of bringing it to an actual game... "The FLEA field testing his Stock Echo1 Genesis OCW in Indoor and OutDoor fields. The OutDoor field limit is 400fps and there is a minimum engagement distance of 10 feet, which make his Genesis OCW perfect for outdoor use since it is shooting right about 390 to 400fps with .20g BBs.