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Posted: 2/26/2006 6:34:04 AM EDT
Were all the SP1 barrels chrome lined, or did some just have the chrome bores? Does the "C MP B" indicate just the bore, or the entire barrel is chrome lined? What about the "C MP Chrome Bore" (which I assume indicates just the bore). Thanks!

Jason
Link Posted: 2/26/2006 6:39:40 AM EDT
[Last Edit: 2/26/2006 6:40:28 AM EDT by M4Madness]
This might help somewhat:

www.ar15.com/forums/topic.html?b=3&f=118&t=264305

I would assume that if the bore is chromed that the chamber would be as well.
Link Posted: 2/26/2006 7:00:42 AM EDT
[Last Edit: 2/26/2006 7:01:45 AM EDT by shamayim]

Originally Posted By M4Madness:
This might help somewhat:

www.ar15.com/forums/topic.html?b=3&f=118&t=264305

I would assume that if the bore is chromed that the chamber would be as well.




"B" indicates an early production fully chromed bore and chamber. Later production pieces were marked "CHROME BORE", probably because the B by itself confused people.

And BTW, I own, and have seen other, Chinese SKS's where the barrel blank was chromed before chambering, so the rifling is plated, but the chamber and barrel lead aren't
Link Posted: 2/26/2006 7:01:58 AM EDT
Thanks for the info. Is one necesarily any better than the other?
Link Posted: 2/26/2006 7:07:07 AM EDT

Originally Posted By Jason280:
Thanks for the info. Is one necesarily any better than the other?



Well, you definitely want a chromed chamber regardless of whether the bore is or not.

As for the bore being chromed, it makes it more corrosion resistant and easier to clean.
Link Posted: 2/26/2006 7:56:11 AM EDT
As regards Colt AR-15 barrels, if the bore is chromed then the chamber is as well.

In the time frame of 1967-72 or so, barrels were made with chromed chambers but unchromed bores. These are marked "C MP C".
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