Need a spring to lower velocity

I have a Pro-Carbine with a Lapco Big-Shot barrel. Because the barrel only has porting at the muzzel, I have trouble getting my velocity down to a level that is acceptable at the field where I play. The field limits velocity to 260-280 fps; with my velocity adjustment screw all the way in, my velocity is usually about 285-295 fps. This happens with CO2 and HPA. I've seen lots of posts about spring kits that raise velocity. Is there a kit with a spring that could lower my velocity to the 260-280 fps range, or should I just get another stock spring and clip it?

I just thought about an RVA. Do you think that would allow me to lower my velocity enough without clipping a spring?

They do, but they are available in just a few places. If anyone has one that they like or knows where to get a good one, your input would be greatly appreciated.

bgx90 wrote: I have a Pro-Carbine with a Lapco Big-Shot barrel. Because the barrel only has porting at the muzzel, I have trouble getting my velocity down to a level that is acceptable at the field where I play. The field limits velocity to 260-280 fps; with my velocity adjustment screw all the way in, my velocity is usually about 285-295 fps. This happens with CO2 and HPA. I've seen lots of posts about spring kits that raise velocity. Is there a kit with a spring that could lower my velocity to the 260-280 fps range, or should I just get another stock spring and clip it?

I would just clip a stock spring.

you may be able to just trim a couple centimeters off the stock one