Better accuracy - Sniper AR-15 4/15 Tri Rail Barrel Mounts for Front Sight Attachment

I had a front flip up sight attached to the hand rail and groups were not all that good. I was looking around for a front sight attachment for the barrel and I came across the Sniper Tri Rail Barrel Mount. Didn't have any trouble with the shims and attached the barrel mount so it lined up with the hand rail and installed the front flip up sight. My rear sight is a Matech picatinny rear ranging sight. Took the rifle to the range, got her all sighted in and was shooting three to four inch groups at 200 yards. I'm happy with that, I'm 70 and I shake a little bit.