Okay folks, got some more questions. I got a cmmg conversion kit and looking to get/ build an upper just for the .22 lr.
Si defense has a stripped upper for 50 bux
tac, innovations has 20" 1:9 stripped heavy barrel for 99 bux with barrel extension installed.
cheap red dot: - local sporting goods store should have it around 10-20 bux.
I don't need a forward assist or dust cover.
Now, the dedicated upper assemblies that are for sale have rifling for .22 lr ranging from 1:14 to 1:15. I am having a hard time looking for a stripped barrel with those twist rate.
BUT seems like enough folks use their standard 1:9 twist with the .22 conversion just fine
So the question is:
1. How does the lighter gr of .22 perform with 1:9 twist. Commercial .22 ammo range from 35-40 gr. I guess this include groups, effective distance, etc.
Thanks
Si defense has a stripped upper for 50 bux
tac, innovations has 20" 1:9 stripped heavy barrel for 99 bux with barrel extension installed.
cheap red dot: - local sporting goods store should have it around 10-20 bux.
I don't need a forward assist or dust cover.
Now, the dedicated upper assemblies that are for sale have rifling for .22 lr ranging from 1:14 to 1:15. I am having a hard time looking for a stripped barrel with those twist rate.
BUT seems like enough folks use their standard 1:9 twist with the .22 conversion just fine
So the question is:
1. How does the lighter gr of .22 perform with 1:9 twist. Commercial .22 ammo range from 35-40 gr. I guess this include groups, effective distance, etc.
Thanks