Rear stock with velocity adjustment?

[spikeball]

Anyone know who makes one of these for a modern spyder? Going to be looking for one for a build soon.

[BrickHaus]

If my memory serves me, JCS made an rva for the spyder and then the JCS folding stocks bolted to that.

[Ecapnation]

Something like this?

[Ghost6]

Ecapnation, that looks like a Trinity stock. It came with a super long Allen Wrench to adjust velocity. JCS used to make a great side folder (I had one and sold it many moons ago, I was young and a fool back then). Google RAP4 or MCS Skeleton Buttstock and you will find one available today, fixed only tho.