Quote:
Originally Posted by jotaerre
Got in ASF Forums :
Inner diameter of the grooved region: 6.15mm
"Regular" inner diameter of barrel: 6.03 or 6.04mm
And twist rate is 1 in 9"...
Thank you all!
JR
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Wow, I had a good guess! I just thought of the best twist rate for the heavier 5.56mm rounds just as an example.