Finally put my kronomag together after a long wait. The EZE kronomag kit itself is fantastic. The lowrhine pump kit I installed is very disappointing. The issue being the shape of the pump grip making it a mongrel to prime even with a k25. It was easier to prime using the stock slide. It's around 170fps with the BT scar and k25. I think it needs a longer barrel as the 18cm the kit comes with seems way too small for the PT volume of the kronos.