Medium Taper Profile
4140 Chrome Moly
Salt Bath Nitride Finish inside and out
9x19mm NATO Chamber
Manufacturer Part Number: 90D3B0A
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This barrel is as advertised, fit and finish were above my expectations, fits mil spec upper with no problems. Fast turn around on delivery. Would recommend this barrel to others for their SBR.
The barrel came in a plastic tube and was wrapped as well. Fit and finish met expectations. The muzzle threads were perfect and it fit my upper without difficulty. Haven't shot it yet, but expectations are high.