Mike,I know that PA will do another exchange for me. I'm just cranky at the thought of going through the whole exchange cycle twice (packing up the rifle, driving it to the FedEx dropoff site and then waiting for the return to arrive, get processed by PA and then wait again for the replacement to arrive while arranging for a signature upon delivery). But, if 530 fps is truly on the low side of reality, I'll undertake the exchange effort a second time. Eric
Nice video mike these m4 are a joy to play with and can shoot straight for what they are .its not like a power house springer or top notch pcp .
Are you supposed to pump these 20 times ? I thought that only after mod's you can pump over 10 times without hurting something. Brewerja, can you post the parts numbers and maybe a desciption of how to modify these to get that additional fps. brent