How would sight picture, point of impact compare when shooting an AR with a .22lr insert? If it’s on at 25 yards with .22lr, would it be on with 5.56 at typical 5.56 yardage?
It is not the same but it is close.
The 5.56x45 is 62 grain projectile.
The .22 is probably 40 grain.
The AR uses a 1 in 9 twist (basic)
And the .22 used 1 in 12, and AR inserts use the existing .223 barrel.
Still, they are great, inexpensive, and relatively accurate for reduced cost training and plinking.