Yeah even though I SBR’d a Lower, I built a pistol lower for waiting on my form 1 to be approved. I used an end plate with a QD socket on it and run a Proctor sling in about the same way you are, cheek on tube and all. It’s better than I thought it would be and makes a good truck gun when I go out of state.

I still prefer the SBR but this is the best way I’ve come up with for a pistol.