Quoted:
Can you please tell me what kind of steel is used on this upper?
http://palmettostatearmory.com/index.php/ar-15-05/barreled-upper-assemblies/psa/5-56-nato-223/sbr-14-7/psa-10-5-5-56-nato-1-7-nitride-upper-without-bcg-or-charging-handle.html
Is it 4140 or 4150? The description is very vague.
Thank you.
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4140 would be my guess it is the "common budget barrel steel" i just bought this upper (about 2 weeks ago) i could not pass it up at this price. i have not had time to shoot it yet, it is monsoon season in florida right now
they also have the kit in stock for $379. i pieced my "pistol kit" together with a nickle boron bcg (all psa parts) for about $10 bucks more than the "kit price" and with $25 dollar shipping it was like $398. i remember a day when
the cheapest bolt carrier group, and barrel cost that much (and were about the same quality). companies like psa's price and quality are changing the market.
http://palmettostatearmory.com/index.php/ar-15-05/barreled-upper-assemblies/psa-10-5-5-56-nato-1-7-nitride-pistol-kit.html