buffer tube

I feel kind of dumb but can't get a definite answer to if these two products will match up: SB Tactical SOB Pistol Stabilizing Brace Black: SB Tactical SOB Pistol Stabilizing Brace Black CZ-USA CZ Scorpion Evo 3 S1 Pistol Arm Brace Kit: CZ-USA CZ Scorpion Evo 3 S1 Pistol Arm Brace Kit...