Here is my short and concise product review of the t81m underfolder.
-received a very nice underfolder. straight in every aspect. slight 1/4" "wobble" when fully open or closed, no side to side wobble... when open and shouldered the rifle does not wobble at all.
-watched utube and read some stuff about "Russian AK47 zero" , and wanted to see this method is applicable
-took it to some private property this weekend to test and enjoy
The information I have been digesting, ala utube, says that the russian method is to set a black rectangle (25cm wide X 35cm tall) on a white backboard at a distance of 100m/109yd.
You are to set your sight at 300m on the rifle, and POA = bottom "line" of the black rectangle (where black meets white on the backer) and aim dead centre of that line.
Using commonly available surplus corrosive ammo, the russian method says you should see point of impact 6-7" above the POA , approx in the dead centre of the black rectangle.
When you get your grouping in the centre of the black rectangle (sights @ 300m , shooting from 100m, aiming for bottom centre line) , then you should have it zero'd perfectly for 50/100m.
User to confirm at 50m and 100m, should hit bullseyes @ 50m or 100m , sights set to 100m .
Here are the results after slightly screwing down the front site post, approx 2 full turns (according to sources, one full turn down raises POI approx 8" up) ...
Disregarding the flier, and going with my friend who shot his 5, the rifle seems to be confirmed at 5-6 moa, with corrosive chinese surplus, which is to be expected and is satisfactory for this platform.
Unfortunately I didn't have any splatterburst paper targets to shoot. I definitely look forward to seeing what the rifle is capable of when fully dialed in.
We shot about 300 rounds, some slow, some as fast at possible and report ZERO MALFUNCTIONS. Not one issue. It goes bang. EVERY. TIME.
Thanks TI for making these available to us! BIG UP!