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As a previous reviewer stated, this thing is way too undergasses. Gas port was only .062 which is too small for a 10'' 300blk. I put it together anyway to see if it would run. With the H1 buffer I had in it, it would not even cycle supers with a supressor. I opened the port to .0935 (#42) and runs as expected.
This is a factory HK thread protector. I had purchased a factory threaded barrel for my P30 however it did not come with one. Although it does not cover the barrels crown, it sits flush with the end of the barrel.
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