Working on a 10.5 inch 6.5g pistol. Its a cut down anderson barrel. Just put the gas tube in the block, and as i slid the gas block on I noticed that the gas tube is contacting the raised sholder of the barrel just behind the gas block.
I tried the same set up on a spare unused BCA 5.56 barrel and it does the same thing. All my other builds have been with SS barrels of better quality (cmmg, AA, etc...) and the same shoulder is a smaller diameter that does not interfere. I have an old fsb and without a gas tube appears that it would clear the shoulder if a gas tube was installed.
I do not think it will affect function but i could imagin a gas tube rupture given enough rounds. Thinking the tube and barrel will rub until the wall is gone on the tube.
Is this a legit concern? Should i go ahead and turn down the shoulder? I'd rather not cause then i'd need to cerekote or parkerize the machined area. Are some barrels designed to use fsb blocks only? Are fsb gas tubes any different?
I tried the same set up on a spare unused BCA 5.56 barrel and it does the same thing. All my other builds have been with SS barrels of better quality (cmmg, AA, etc...) and the same shoulder is a smaller diameter that does not interfere. I have an old fsb and without a gas tube appears that it would clear the shoulder if a gas tube was installed.
I do not think it will affect function but i could imagin a gas tube rupture given enough rounds. Thinking the tube and barrel will rub until the wall is gone on the tube.
Is this a legit concern? Should i go ahead and turn down the shoulder? I'd rather not cause then i'd need to cerekote or parkerize the machined area. Are some barrels designed to use fsb blocks only? Are fsb gas tubes any different?
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