Just wanna give a shout out and say how great of a deal these zm4 barrels are. I have a psa freedom nitride, and out of the box the dsa is more accurate. After  a couple mag “break in”, the groups really closed up. A great Great bang for your Buck at around $150, and comes chrome lined. Awesome job. Hope they get in stock again, I’m thinking of trying out the hbar next.

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Can do