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Posted: 4/30/2009 3:24:17 AM EDT
quick question
16" Sherluk, and a 7.5" Model 1 Sales. What are they chambered for? .223 only or are they 5.56?
is there a way to look at it and tell what it is?
Link Posted: 4/30/2009 3:30:12 AM EDT
It should be stamped on the barrel, either .223 or 5.56.  Lower Receivers may be stamped for one or the other, BUT, I'm sure you know the lower receiver has nothing to do with the chamber, and is often wrong, you have to go off what is stamped in the barrel.  Other than the stamp on the barrel, you have to take casts of the chamber and measure OR contact the manufacturer and trust the information the manufacturer gives you.
Link Posted: 4/30/2009 3:39:58 AM EDT
is there a standard location(on the barrel) where the stampings are located or could it be anywhere?
Link Posted: 4/30/2009 3:42:20 AM EDT
On Model 1 barrels it will be stamped close to the front sight just towards the flash hider.
Link Posted: 4/30/2009 3:50:59 AM EDT
[Last Edit: 4/30/2009 3:58:21 AM EDT by sailmirage]
The 7.5" says        M1S  1-9
Link Posted: 4/30/2009 4:42:52 AM EDT
Originally Posted By sailmirage:
The 7.5" says        M1S  1-9


I have a 20" that says the same thing on it, I emailed them asking if it was a .223 or 5.56 and never got a response.

If you find out please post what it is.
Link Posted: 4/30/2009 5:38:33 AM EDT
1-9 is a 5.56 twist.  You need that twist to stabilize 62+ grain bullets.  223 twist is generally 1-12 to stabilize up to 55 grain bullets.  

That doesn't answer your question but it'll give you a direction to lean.
Link Posted: 4/30/2009 6:28:28 AM EDT
Originally Posted By FIGJAM:
1-9 is a 5.56 twist... 223 twist is generally 1-12...



Rate of twist has NOTHING to do with chamber dimensions.
Please do not confuse the issue.
Link Posted: 4/30/2009 6:51:12 AM EDT
Be aware that some barrels that have been marked 5.56 turned out to be .223. Unfortunately there is no easy way to check, unless you have one of Ned's $250 reamers. If you start getting stuck cases and/or blown out primers when shooting 5.56, you may have a .223 chamber.
Link Posted: 4/30/2009 9:33:30 AM EDT
Originally Posted By FIGJAM:
1-9 is a 5.56 twist.  You need that twist to stabilize 62+ grain bullets.  223 twist is generally 1-12 to stabilize up to 55 grain bullets.  

That doesn't answer your question but it'll give you a direction to lean.


Absolute nonsense. Please don't post things that have no basis in fact.

Posted Via AR15.Com Mobile
Link Posted: 4/30/2009 4:50:22 PM EDT
[Last Edit: 4/30/2009 5:05:12 PM EDT by sailmirage]
Looked at Model 1 Sales and everything they sell is marked 5.56/223 so I would think its safe to say its chambered 5.56
As far as the Sherluk I guess I will have to ask the Sherluk lady at the next show??
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