THE BEST SIDE OF 40 S&W 155 GRAIN AMMO

Fired flawlessly by means of my Glock. At 21ft went from ten inch groupings right down to 2 in groupings utilizing these things then again to 10 inch groupings just after I applied it. Apparent as day this stuff is correct with pretty much NO recoil. Would not want this in a tactical situation but in order to see how exact you actually attempt thes