Hello, I am looking for some advice on fixing a problem with a silverback SRS a1 pull bolt version. I just recently got mine and have been experimenting with upgrades, one of which is a spring. I purchased a Silverback M160 APS 13mm Type Spring for SRS Pull Bolt Version,
Link to Spring...
So I have a srs a1 22''. I would love to convert this to HPA. I've seen a video with someone playing with one that had been converted but I cant find the video anymore.
Can anyone help me with this? which hpa would be compatible and/or how to do it?