User Panel
User Panel
User Panel
|
Posted: 12/19/2020 12:38:16 PM EDT
[#1]
The threads on your tube would likely yield long before an issue with your receiver.
Buy a quality castle nut for replacement and inspect tube threads. |
|
|
|
Posted: 12/19/2020 12:39:34 PM EDT
[#2]
Probably just a crap castle nut. If the threads are okay I highly doubt there is any damage to the lower itself, depending on how you held it. There is no need to torque the shit out of a castle nut. Shit, I hold the lower in my hand the the stock between my legs. Stake it and it ain't going anywhere.
|
|
|
|
Posted: 12/19/2020 12:54:13 PM EDT
[#3]
Quote HistoryQuoted: There is no need to torque the shit out of a castle nut. This |
|
|
|
Posted: 12/19/2020 12:54:46 PM EDT
[#4]
If you could tell us the source(seller/brand) for the castle nut, that would really appreciated.
Short of a bad batch of heat treatment, it's pretty hard to think that a steel castle nut would crack before it simply deformed/rounded out the notch. Can you share a photo as well? |
|
|
|
Posted: 12/19/2020 1:01:00 PM EDT
[#5]
Thanks for the replies! I appreciate the help. I'll take a closer look at the threads and make sure they look ok. I had the lower on vise block when I torqued it down.
|
|
|
|
Posted: 12/19/2020 1:13:38 PM EDT
[#6]
Quote HistoryQuoted: If you could tell us the source(seller/brand) for the castle nut, that would really appreciated. Short of a bad batch of heat treatment, it's pretty hard to think that a steel castle nut would crack before it simply deformed/rounded out the notch. Can you share a photo as well? The castle nut was Aero Precision. It was included with an Aero Precision buffer tube kit I bought for the build. I should have taken a picture or kept it, but I already tossed it. The castle nut snapped and broke at one of the notches. |
|
|
|
Posted: 12/19/2020 1:34:36 PM EDT
[#7]
happened to me before.
i greased my threads, installed my tube, properly torqued castle nut the right way, 90* 40ftlbs, i couldnt remove it when i tried to, not staked. used 3 different wrenches and they all slipped. held square etc. im very mechanically inclined. name brand nut too. couldnt get it off. so, i used an 18" pipe wrench, the nut cracked in half and fell off as i loosened it. no damage to receiver. some the threads were gouged on the extension tube. i wouldnt worry about the threads on the extension tube its fine. but do you personally want gauged up parts on your gun if you dont have to? i always clamp the tube in the vise when torquing the nut down, i dont like the flex and stress on the receiver using a magwell block. |
|
|
|
Posted: 12/19/2020 2:05:51 PM EDT
[#8]
Quote HistoryQuoted: happened to me before. i greased my threads, installed my tube, properly torqued castle nut the right way, 90* 40ftlbs, i couldnt remove it when i tried to, not staked. used 3 different wrenches and they all slipped. held square etc. im very mechanically inclined. name brand nut too. couldnt get it off. so, i used an 18" pipe wrench, the nut cracked in half and fell off as i loosened it. no damage to receiver. some the threads were gouged on the extension tube. i wouldnt worry about the threads on the extension tube its fine. but do you personally want gauged up parts on your gun if you dont have to? i always clamp the tube in the vise when torquing the nut down, i dont like the flex and stress on the receiver using a magwell block. The flex/stress on the receiver was what had me worried. I bought a new extension tube already, but I was less than impressed with the castle nut that came with the replacement Aero buffer kit I ordered. The staking notches looked terrible to me, so I ended up spending & ordering a couple Forward Controls Designs castle nuts which look great. |
|
|
|
Posted: 12/20/2020 7:35:37 PM EDT
[#9]
Interesting... This castle nut was possibly from Aero Precision too.
 AR Castle Nut Failure |
|
|
|
Posted: 12/20/2020 8:44:34 PM EDT
[#10]
If you are getting s replacement forward control design makes a good one.
https://www.forwardcontrolsdesign.com/CNF-Castle-Nut-Forward-Controls_p_103.html |
|
|
|
Posted: 12/20/2020 9:08:56 PM EDT
[#11]
Quote HistoryQuoted: happened to me before. i greased my threads, installed my tube, properly torqued castle nut the right way, 90* 40ftlbs, i couldnt remove it when i tried to, not staked. used 3 different wrenches and they all slipped. held square etc. im very mechanically inclined. name brand nut too. couldnt get it off. so, i used an 18" pipe wrench, the nut cracked in half and fell off as i loosened it. no damage to receiver. some the threads were gouged on the extension tube. i wouldnt worry about the threads on the extension tube its fine. but do you personally want gauged up parts on your gun if you dont have to? i always clamp the tube in the vise when torquing the nut down, i dont like the flex and stress on the receiver using a magwell block. It probably galled over a few threads while going on, which is like x-threading. I think it's important for people to check the threadings using a thread gauge before installing the parts. You'd be surprised what you find.  Also good to just check how loose or tight the nut is on the buffer tube. If it wobbles around when threaded on, that's not good. This fitment should be fairly wobble free. I most of the time use the DoubleStar thin lock rings, 1st one snuggly, and a 2nd as a locking nut. Then no need to stake it. Never had an issue. |
|
|
|
Posted: 12/21/2020 10:13:33 AM EDT
[#12]
Quote HistoryQuoted: If you are getting s replacement forward control design makes a good one. https://www.forwardcontrolsdesign.com/CNF-Castle-Nut-Forward-Controls_p_103.html That's good to hear. I bought a few of those to try. |
|
|
|
Posted: 12/21/2020 10:20:04 AM EDT
[#13]
Quote HistoryQuoted: Interesting... This castle nut was possibly from Aero Precision too.  https://www.youtube.com/watch?v=t9GHDAmK24ISounds familiar. Heard a popping noise and the nut split at one of the notches, although it didn't split into two pieces. I really wish I'd taken a picture of it. |
|
|
|
Posted: 12/21/2020 11:26:24 AM EDT
[#14]
yeah i just happen to catch that SOTAR video this morning and definitely not something that's usual. I suspect a bad batch.
The Forward Controls one is solid |
|
|
|
Posted: 1/13/2021 2:50:25 PM EDT
[#15]
Broke one too. Only my second "build" so maybe it was my fault but I think it was a cheap part.
The part came in a buffer kit from Kaw Valley and had all 5 star reviews on the website I ordered it from. item on wing tactical I used a real avid armorers wrench and didn't even seem to crank it too hard. I had just installed a spikes tactical castle nut on a different lower using the same wrench and it went on fine and luckily had a second ST nut to use as a replacement for the Kaw valley one I just broke. Im assuming that is a cheap castle nut with that granular looking metal on the broken edge. Is that a cast piece then? Just starting out in the AR building world. |
|
|
|
Posted: 1/13/2021 3:19:09 PM EDT
[#16]
Quote HistoryQuoted: yeah i just happen to catch that SOTAR video this morning and definitely not something that's usual. I suspect a bad batch. The Forward Controls one is solid I believe Chad from SOTAR helped design the FCD castle nut |
|
|
|
Posted: 1/13/2021 3:20:37 PM EDT
[#17]
Quote HistoryQuoted: Broke one too. Only my second "build" so maybe it was my fault but I think it was a cheap part. https://drive.google.com/uc?export=view&id=1_yNkepN_Z5pQRPBs9M07gvbMFz3ba56Z The part came in a buffer kit from Kaw Valley and had all 5 star reviews on the website I ordered it from. item on wing tactical I used a real avid armorers wrench and didn't even seem to crank it too hard. I had just installed a spikes tactical castle nut on a different lower using the same wrench and it went on fine and luckily had a second ST nut to use as a replacement for the Kaw valley one I just broke. Im assuming that is a cheap castle nut with that granular looking metal on the broken edge. Is that a cast piece then? Just starting out in the AR building world. That looks MIM or cast. |
|
|
|
Posted: 1/13/2021 9:36:21 PM EDT
[#18]
Quote HistoryQuoted: That looks MIM or cast. Cast shouldn't look grainy like that. The uniform look inside and out of that nut makes me think polymer of some sort. If it's metal and heat treated, it looking like that is a sign that the metal was burned before the quench and instead of hardening the metal, made it weak and brittle. |
|
|
|
Posted: 1/13/2021 10:36:00 PM EDT
[#19]
Quote HistoryQuoted: Cast shouldn't look grainy like that. The uniform look inside and out of that nut makes me think polymer of some sort. If it's metal and heat treated, it looking like that is a sign that the metal was burned before the quench and instead of hardening the metal, made it weak and brittle. Quote HistoryQuoted: Quoted: That looks MIM or cast. Cast shouldn't look grainy like that. The uniform look inside and out of that nut makes me think polymer of some sort. If it's metal and heat treated, it looking like that is a sign that the metal was burned before the quench and instead of hardening the metal, made it weak and brittle. The entire thing is magnetic, so guessing its all metal but not sure how it was made. Didn't seem to be too strong.! |
|
|
Win a FREE Membership!
Sign up for the ARFCOM weekly newsletter and be entered to win a free ARFCOM membership. One new winner* is announced every week!
You will receive an email every Friday morning featuring the latest chatter from the hottest topics, breaking news surrounding legislation, as well as exclusive deals only available to ARFCOM email subscribers.
AR15.COM is the world's largest firearm community and is a gathering place for firearm enthusiasts of all types.
From hunters and military members, to competition shooters and general firearm enthusiasts, we welcome anyone who values and respects the way of the firearm.
Subscribe to our monthly Newsletter to receive firearm news, product discounts from your favorite Industry Partners, and more.
Copyright © 1996-2024 AR15.COM LLC. All Rights Reserved.
Any use of this content without express written consent is prohibited.
AR15.Com reserves the right to overwrite or replace any affiliate, commercial, or monetizable links, posted by users, with our own.
