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Rifles, Reloading, Optics, Equipment
AR15/10 Rifles
AR wives tales
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<blockquote data-quote="MSURunner" data-source="post: 2981639" data-attributes="member: 102961"><p>Take the spring out and measure it for length. If it is >=11.75 it's a Rifle length spring. It sounds like you have a rifle buffer tube (screws in with a flat on the back to torque and completely round), so the next thing I would say is make sure there aren't any spacers on the inside of the tube. Is it difficult to pull back through the entire stroke or only initially? If it is easier to pull back after you've started it, then you may have some issues with your bolt unlocking (either too tight of tolerances, machining burrs, cam pin issue, or just plain dirty). As for changing the spring to a softer spring, yes, it will change ejection angle because the brass will be pulled back quicker. Ideal for most guns is probably in the 330-430 window, but if you're going to err one way or the other, I would choose over gassed to under gassed (which means I'd take a 230-330 if that was necessary). There are a lot of variables (barrel length, gas system length, gas block setup, BCG weight, buffer weight, buffer spring) to this that probably could be a thread in and of itself. Without knowing those, we're just guessing at your problem.</p></blockquote><p></p>
[QUOTE="MSURunner, post: 2981639, member: 102961"] Take the spring out and measure it for length. If it is >=11.75 it's a Rifle length spring. It sounds like you have a rifle buffer tube (screws in with a flat on the back to torque and completely round), so the next thing I would say is make sure there aren't any spacers on the inside of the tube. Is it difficult to pull back through the entire stroke or only initially? If it is easier to pull back after you've started it, then you may have some issues with your bolt unlocking (either too tight of tolerances, machining burrs, cam pin issue, or just plain dirty). As for changing the spring to a softer spring, yes, it will change ejection angle because the brass will be pulled back quicker. Ideal for most guns is probably in the 330-430 window, but if you're going to err one way or the other, I would choose over gassed to under gassed (which means I'd take a 230-330 if that was necessary). There are a lot of variables (barrel length, gas system length, gas block setup, BCG weight, buffer weight, buffer spring) to this that probably could be a thread in and of itself. Without knowing those, we're just guessing at your problem. [/QUOTE]
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Rifles, Reloading, Optics, Equipment
AR15/10 Rifles
AR wives tales
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