The results were underwhelming. Both JP and Tactical Solutions make fantastic products, but unfortunately, the JP FCG doesn’t possess enough oomph to detonate .22 rounds reliably.
I’ve been told that there are a couple of fixes for this (one of which is featured prominently at link above). From what I’m told, you can make the ignition more reliable either by changing out the hammer spring for a heavier one, or replacing the hammer with a standard GI one. I may give one of these solutions a go, but in the meantime, I’ll just play musical lowers and mate the Tac Sol upper with a lower that has a Rock River National Match Two Stage trigger in it. The trigger pull is heavier, but certainly not unreasonable, and ignition of the rounds is quite reliable.