SAI Gen 4 mount
I must be lucky... mine works fine.
I have the aluminum SAI Gen 4 mount on my Socom 16. I did have to
read the instructions three or four times to make sure I understood
exactly what they intended to convey. There is a sequence to mounting it,
torque the screws, installing the rear attachment point, alignment, etc.
Once mounted, I was able to sight-in my Redfield Revolution 2-7x32mm
scope in no time at all. It's held zero for almost 500 rounds as of today.
I went to the range this afternoon and fired off some MEN 92 and FGMM.
I've been very happy with the results. I got the mount on sale, the scope
is a great value, has great glass, is bright, and operates very smooth.
I've actually shot 168gr .308 FGMM at sub MOA, 5 shot groups in past
sessions. Today the best my eyes could do was 1.25 MOA.
The MEN 92 shot 1.75-2.0 MOA, rapid fire, 5 shot groups at 100 yards.
The mount has not come loose, it aligned okay when first mounted, scope
windage and elevation adjustments were straight forward. I was able to get
it zeroed initially in no time. Been zeroed ever since. I did make sure the
alignment slots in the receiver and the tabs in the mount fit.
One thing I did discover with my rig, my POI with NATO ammo shoots 4-5
inches higher than 308 ammo at 100 yards. This is very repeatable, works
every time. I've shot MEN, Venezuela, South African, and Winchester white
box NATO and all have shot accurate but high. Good groups, all consistent,
but higher than the 308. I've also shot different brands of 308, and they all
shoot consistent, but lower than the NATO. I assume that's the difference
between NATO and 308 dimensionally. I can go back and forth between the
NATO and 308, and get the same grouping each time.