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Posted: 1/10/2006 8:27:56 PM EDT
I've seen 1/12 and 1/7 while surfing the www. Thanks!

Link Posted: 1/11/2006 4:08:09 AM EDT
I've seen many more in 1/12 than 1/7.
Link Posted: 1/11/2006 9:01:20 AM EDT
It's a pretty good rule of thumb that ALL of the .223 rifles imported by Action Arms and Magnum Research were 1/12. The 1/7s were on the Springfield Armory Sporter imports.
Link Posted: 1/11/2006 10:31:10 AM EDT
I found some more info: For the .223/5.56

Actions Arms models are all 1-12 twist include
models 361, 372, 386, and 392

Springfields are all 1-7 twist include
models 386S, 392S, 397S, and 710S

Magnum Research are all 1-12.

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