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Discussion in 'Black Rifle Forum' started by mknherhappy, Apr 6, 2010.
Anyone know for sure what twist rate the military M4's have?
Current M4s have a 1-in-7
I believe it's 1:7.
Haven't you heard? Obama is getting rid of all guns for the military because it makes us look mean. Our new standard issue slingshots have a 1/1 twist ratio.
1 in 7 with modified feed ramps now.
Yeah, it's 1/7, I figured someone else would have posted it, but i wanted to sse my own typing.
All my M-4's are 1/7
Hey,.....I think they are 1/7 twist.
Current US Military M4's have a barrel twist rate of 1 turn in 7 inches.
M4s have a 1/7 twist rate.
and now for an added twist on the question (pun intended).
Why do they have a 1:7 twist?
the original 1:7
To stabilize tracer rounds; 1:9 gives good performance with 69gr projectiles
69's are ok but 77's are better.
1:7 crew checking in!
Because of the CHART!
It says a mil-spec M4 must have a 1:7 barrel rifling rate.
I must agree that is one part of the chart that folks get all bent out of shape on, even though it is only a informational chart.
The 1/7 is NOT needed if you only ever plan to shoot 55 grains.
I will once again plead for the AR makers to make a 1/8 twist 5.56 CL M4'ish type barrel. If they would make this they could drop the 1/7 and 1/9 different offerings and just have one good barrel you could shoot the short 45 grainers to the longest you could stuff in a mag.