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gas port

  1. A

    6.5 Grendel with Lilja barrel won't shoot straight

    Hello Hide, I don’t post online much but I’m stumped. Been shooting and reloading for my 6.5 Grendel AR for about 6 years. Im a machinist and have been hobby gunsmithing for 30 years but far from an expert. Recently replaced the Alexander Arms 18” barrel with a Lilja 16”. Started out with...
  2. Dvando20

    Maximum gas port size?

    What is the max you can go with opening up the gas port on an 18" SPR TBox barrel in .223Wylde without asking for catastrophy? It's already at the max-spec .098" with an SLR adjustable block, but it's still short stroking with the block all the way open. Tried different springs, buffers, blocks...
  3. Wheres-Waldo

    Gas ports lands or grooves?

    Is there any difference in whether a port should be located in the land or groove of a barrels rifling? Furthermore, I've been advised that a port that has been located in a portion of rifling that bisects a land AND a groove has no effect on accuracy... True/False? I Google'd it up and there...
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