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Rifles, Reloading, Optics, Equipment
AR15/10 Rifles
AR10 barrel nut problem
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<blockquote data-quote="ntsqd" data-source="post: 3067609" data-attributes="member: 93138"><p>Thank you for what I've bolded! That doesn't seem to be understood by many. I didn't understand it until faced with this and had to think about things. High and low would require different gas tubes and gas keys if they weren't the same. I'm curious about those who say you have to use a large frame gas tube. In the massive range of my experience (3 large frame upper builds, note the heavy sarcasm!) this has yet to be the case. Being notoriously curious I'm wondering what they've run into that makes them say that.</p><p></p><p>Aha, going looking to see what the APRH308910 nut looks like allowed me to find the nut that I do have, it is the <a href="https://www.aeroprecisionusa.com/308-atlas-barrel-nut" target="_blank">APRH100887C</a> Looking at that image the gas tube grooves are not very deep. I suspect that I'm going to be making one of those grooves deeper. Works with their uppers, which is all that any mfg. can really do because they have no control over what any other mfg. does, but for whatever reason doesn't work with the CMMG upper. </p><p></p><p></p><p>Aero barrel nut and Aero hand-guard, they came together.</p><p></p><p>So do I unless Aero determines that the nut's machining is wrong and replaces it. </p><p>----</p><p>Two things that I wish were different. A) That I could buy the Aero Enhanced monolithic upper with a hand guard that lacks a rail down the top of it. I really have no need for such a thing and don't like the looks of it (The S-One was as close as I could find). B) I could, and do on small frames, live with a full length top rail if I could get a flat bottomed hand-guard like the SP3Rv3 for a large frame. Best would be a flat bottomed hand-guard with no top rail.</p><p>----</p><p>As can be seen, it just barely doesn't work:</p><p>[ATTACH=full]556684[/ATTACH]</p><p></p><p>I couldn't get the camera right down coaxial to the clover-leaf hole, this is as close as I could get it:</p><p>[ATTACH=full]556685[/ATTACH]</p><p></p><p>From the inside, can see three of the four tangs in the clover-leaf hole:</p><p>[ATTACH=full]556686[/ATTACH]</p><p></p><p>Without the barrel nut it slides in like it is supposed to, and has about equal free motion in all 4 cardinal directions. Can also see that the bends are nowhere near the nut:</p><p>[ATTACH=full]556687[/ATTACH]</p><p>----</p><p>Just learned something else. A Nicholson chain-saw sharpening file is very close to being exactly the right diameter to lay in those grooves without rolling or rocking. <img src="data:image/gif;base64,R0lGODlhAQABAIAAAAAAAP///yH5BAEAAAAALAAAAAABAAEAAAIBRAA7" class="smilie smilie--sprite smilie--sprite1" alt=":)" title="Smile :)" loading="lazy" data-shortname=":)" /></p></blockquote><p></p>
[QUOTE="ntsqd, post: 3067609, member: 93138"] Thank you for what I've bolded! That doesn't seem to be understood by many. I didn't understand it until faced with this and had to think about things. High and low would require different gas tubes and gas keys if they weren't the same. I'm curious about those who say you have to use a large frame gas tube. In the massive range of my experience (3 large frame upper builds, note the heavy sarcasm!) this has yet to be the case. Being notoriously curious I'm wondering what they've run into that makes them say that. Aha, going looking to see what the APRH308910 nut looks like allowed me to find the nut that I do have, it is the [URL='https://www.aeroprecisionusa.com/308-atlas-barrel-nut']APRH100887C[/URL] Looking at that image the gas tube grooves are not very deep. I suspect that I'm going to be making one of those grooves deeper. Works with their uppers, which is all that any mfg. can really do because they have no control over what any other mfg. does, but for whatever reason doesn't work with the CMMG upper. Aero barrel nut and Aero hand-guard, they came together. So do I unless Aero determines that the nut's machining is wrong and replaces it. ---- Two things that I wish were different. A) That I could buy the Aero Enhanced monolithic upper with a hand guard that lacks a rail down the top of it. I really have no need for such a thing and don't like the looks of it (The S-One was as close as I could find). B) I could, and do on small frames, live with a full length top rail if I could get a flat bottomed hand-guard like the SP3Rv3 for a large frame. Best would be a flat bottomed hand-guard with no top rail. ---- As can be seen, it just barely doesn't work: [ATTACH=full]556684[/ATTACH] I couldn't get the camera right down coaxial to the clover-leaf hole, this is as close as I could get it: [ATTACH=full]556685[/ATTACH] From the inside, can see three of the four tangs in the clover-leaf hole: [ATTACH=full]556686[/ATTACH] Without the barrel nut it slides in like it is supposed to, and has about equal free motion in all 4 cardinal directions. Can also see that the bends are nowhere near the nut: [ATTACH=full]556687[/ATTACH] ---- Just learned something else. A Nicholson chain-saw sharpening file is very close to being exactly the right diameter to lay in those grooves without rolling or rocking. :) [/QUOTE]
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AR15/10 Rifles
AR10 barrel nut problem
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