opinion on my 5.58 HRA

[Curt]

Maybe ten years back I bought a service grade of every manufacturer,when they first anounced you could pick manufacturer. I was looking at my HRA 5.58 million. LMR barrel I think is correct, 3/8 DAS stock I might have swapped off another M1.Stacking swivel screw appears to be staked by mushrooming the the end of the screw. Of note is that the muzzle crown is set deep is this typical of LMR barrels? I think all over parts are HRA stamped. Do these parts sound OK for the serial range?

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