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Crow Hunter · September 4, 2012, 08:45 AM

http://www.dpmsinc.com/Frequently-Asked_ep_55-1.html

http://www.armalite.com/Categories.aspx?Id=Library

Chrome-Moly is an alloy of steel. It has Chrome and Molybdenum as additive.

http://en.wikipedia.org/wiki/41xx_steel

Chrome lined means they put a layer of hard chrome over the rifling. It improves corrosion and wear resistance.

http://www.google.com/search?q=chrom...w=1207&bih=723

You will need to determine the height of your front gas block to figure out what height front sight you will need. I would email DPMS with your serial number and tell them what you want to do and see what they recommend.

September 4, 2012, 08:45 AM	#2
Crow Hunter Senior Member Join Date: January 27, 2012 Posts: 1,078	http://www.dpmsinc.com/Frequently-Asked_ep_55-1.html http://www.armalite.com/Categories.aspx?Id=Library Chrome-Moly is an alloy of steel. It has Chrome and Molybdenum as additive. http://en.wikipedia.org/wiki/41xx_steel Chrome lined means they put a layer of hard chrome over the rifling. It improves corrosion and wear resistance. http://www.google.com/search?q=chrom...w=1207&bih=723 You will need to determine the height of your front gas block to figure out what height front sight you will need. I would email DPMS with your serial number and tell them what you want to do and see what they recommend. __________________ I am no longer participating in gun forums. Good luck.