I have a 24" 6.5CM LFAR barrel getting finished up right now. .936 gas block. It's pretty close to an M24 contour and as heavy as we could go for a gas gun barrel. With a Seekins SP-10 builders kit, Magpul PRS stock, JP SCS, BCG, TT diamond, CH, Hawkins updraft muzzle brake, etc..it all weighs 13lbs before a bipod and scope. With a CkyePod and 5x25 in a Hawkins mount it's probably going to be 17lbs. That's almost NRLH weight. I bet if I put an NX8 on it with a CkyePod it would make open heavy. It's still going to need side weights to make basic PRS rifle weight.
JP doesn't really do PRS. Even though some of their employees will shoot matches like Steel Safari, as a company they're still in this 3G/ USPSA PCC space. And it kind of makes sense because a PRS gas gun is kind of a misnomer. It's basically a handicap division like TAC. There's zero advantage to shoot a gas gun in PRS. The stages aren't conducive to it. QP and 3G are disciplines where a gas gun would be a clear advantage over a bolt gun so it makes more sense to people and it makes sense that companies pursue those areas. Hell, just try finding a 936 gas block from JP or Riflespeed.