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Old February 8, 2018, 01:08 PM   #18
MarkCO
Senior Member
 
Join Date: October 21, 1998
Location: Colorado, USA
Posts: 4,296
SA uses 416 stainless for the stainless, and Melonited Steel. Both are appropriate and much harder than untreated steel or 303.

I make a gas block (non-adjustable) and comp for the AR15 and I only use 416. I pay more for the heat treat than some companies charge for their parts retail...it is that important to me to make the best parts I can. We have never had a failure of our gas block or comp. In fact, while most comps last for the life of a barrel, ours last for the life of several barrels.

I did a lot of poking and prodding to check out SA before I bought one of their gas blocks, and now I have three. I have a box with at least two dozen failed adjustable gas blocks. SA did a great job and that is the only reason I use and recommend them, and I have no association with them at all. Ask me what trigger or comp, I will say it depends...adjustable gas blocks, only SA gets the recomendation from me.
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