Rebel_Rider1969
Well Known Nuisance
Locking brace? Rifle tube? I saw one like it on the new ruger ar pistol.
https://www.joeboboutfitters.com/KA...Pistol-Stabilizing-Br-p/kak-shockwave-2.0.htm
https://www.joeboboutfitters.com/KA...Pistol-Stabilizing-Br-p/kak-shockwave-2.0.htm