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5/18/2026 5:07:13 PM EDT
[#2]
Damitt! I'm 300 miles away from the rifles and cannot measure the barrels.

Anyone know the diameter on Gen 1  223 Rem, 300ACC and .308 Win. muzzles?
5/19/2026 5:01:09 AM EDT
[Last Edit: 1168RGR][Edited] [#3]
Bought for the Gen I Grendel.
5/19/2026 6:55:27 AM EDT
[#4]
Anyone have barrel diameters for the Gen I .300 BLK, and the current gen 6ARC? Might buy some gifts.
5/19/2026 9:00:58 AM EDT
[Last Edit: mike_nds][Edited] [#5]
Originally Posted By John-in-austin:
Damitt! I'm 300 miles away from the rifles and cannot measure the barrels.

Anyone know the diameter on Gen 1  223 Rem, 300ACC and .308 Win. muzzles?
View Quote



I'll see if I have the old caliber/size chart.

I'm 99.9% sure the 5.56 ranch uses the .687" diameter NDS-56.

But it's best bet is to measure your actual barrel.
We are living in a Tom Clancy novel

Over 50 and reputed to be a formidable brigand

https://hr1871.com/

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