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Posted: 8/20/2011 10:45:21 AM EST
I just purchased a CMMG complete lower today at a fun show and the Castle Nut is not staked?  What is easiest way to stake this?
Link Posted: 8/20/2011 10:47:16 AM EST
[#1]
with an automatic punch like this


Link Posted: 8/20/2011 10:52:13 AM EST
[#2]
the above punch or a regular one work just fine. it doesn't take much to move the metal, so don't hit it like it's sleeping with your wife.
Link Posted: 8/20/2011 11:40:30 AM EST
[#3]
Support the buffer tube and lock ring so they do not move when you stake the thing.
Edge of a dull screwdriver pressed at a slight angle. Bash the tool with a large hammer (hand sledge) and make the metal move with the one strike.
You get a nice square shaped gouge of metal into the lock ring cut-out. Touch up with a dab of cold blue to protect the finish. All done.

If you miss your swing and bash the damn thing slightly off, you can get a good sized elongated scratch along the buffer tube
Link Posted: 8/20/2011 11:53:43 AM EST
[#4]
Quoted:
with an automatic punch like this

http://www.tien-i.com/img/Product_content/automatic-punch.jpg


+1


Link Posted: 8/20/2011 11:58:23 AM EST
[#5]
Quoted:
with an automatic punch like this


http://www.tien-i.com/img/Product_content/automatic-punch.jpg


This.  It will also unstake it if you ever want to take it off.
Link Posted: 8/20/2011 12:06:21 PM EST
[#6]
I use a dab of locktite
Link Posted: 8/20/2011 12:33:34 PM EST
[#7]
Quoted:
I use a dab of locktite


You must work for RRA!

I use a scratch awl and hammer, but the above posted job done with an automatic punch looks better.
Link Posted: 8/20/2011 12:46:12 PM EST
[#8]
Quoted:
Quoted:
I use a dab of locktite


You must work for RRA!

I use a scratch awl and hammer, but the above posted job done with an automatic punch looks better.


Only if it is red loctite.  I use a drop of blue with good results on guns that I know I am going to be in again or customer's guns that I don't want to hammer on.  Run across other brands of guns that have had red on them too, but the RRA ones are the most aggravating.
Link Posted: 8/20/2011 1:03:01 PM EST
[#9]
Quoted:
with an automatic punch like this


http://www.tien-i.com/img/Product_content/automatic-punch.jpg


This^^^^ and a drop of Blue Locktight. makes it very easy.
Link Posted: 8/20/2011 1:05:42 PM EST
[#10]
I use a 1/2 in chisel that I rounded the edge on..gives great stakes on carrier keys as well.
Link Posted: 8/20/2011 1:07:21 PM EST
[#11]
Link Posted: 8/20/2011 1:13:02 PM EST
[#12]
Quoted:
as said above, but be careful with aluminum sling mount end plates, and dont even try to stake a Magpul ASAP.


Do tell...?
Link Posted: 8/20/2011 1:18:35 PM EST
[#13]
Quoted:
Quoted:
as said above, but be careful with aluminum sling mount end plates, and dont even try to stake a Magpul ASAP.


Do tell...?


I've done it once.  It is a little larger in diameter than a regular plate and it looks like utter crap when done.  I hate having to resort to using loctite in most cases, but the castle nut is one of those places where it works fine.  The shop demo gun had a DD qd plate that is aluminum.  I run that gun until it is impossible to hold and the blue has not failed me yet.
Link Posted: 8/20/2011 1:24:19 PM EST
[#14]
n/m
Link Posted: 8/20/2011 1:26:59 PM EST
[#15]
Quoted:
Quoted:
with an automatic punch like this


http://www.tien-i.com/img/Product_content/automatic-punch.jpg


This^^^^ and a drop of Blue Locktight. makes it very easy.


Plus 1, 2, 3, 4 and 5. Auto punch and some Blue Loctite.
Link Posted: 8/20/2011 1:34:07 PM EST
[#16]
Quoted:
Quoted:
I use a dab of locktite


You must work for RRA!

I use a scratch awl and hammer, but the above posted job done with an automatic punch looks better.


I use a scratch awl and hammer too. I have two different automatic punches and they are not strong enough to make much of a dent.
What brand auto punch works well for those who use them, particularly the job pictured above?
Link Posted: 8/20/2011 1:43:57 PM EST
[#17]
Quoted:
Quoted:
Quoted:
I use a dab of locktite


You must work for RRA!

I use a scratch awl and hammer, but the above posted job done with an automatic punch looks better.


I use a scratch awl and hammer too. I have two different automatic punches and they are not strong enough to make much of a dent.
What brand auto punch works well for those who use them, particularly the job pictured above?


MIne was a $9 Home Depot special, works great.
Link Posted: 8/20/2011 1:51:39 PM EST
[#18]
Quoted:
Quoted:
Quoted:
as said above, but be careful with aluminum sling mount end plates, and dont even try to stake a Magpul ASAP.


Do tell...?


I've done it once.  It is a little larger in diameter than a regular plate and it looks like utter crap when done.  I hate having to resort to using loctite in most cases, but the castle nut is one of those places where it works fine.  The shop demo gun had a DD qd plate that is aluminum.  I run that gun until it is impossible to hold and the blue has not failed me yet.


I just didn't know if it was super hardened or something.
Mine staked ok, but I don't really care how it looks as long as it holds.
I have a punch I ground to a rectangle tip and use that for staking.







Link Posted: 8/20/2011 2:02:04 PM EST
[#19]
Quoted:
Quoted:
Quoted:
Quoted:
as said above, but be careful with aluminum sling mount end plates, and dont even try to stake a Magpul ASAP.


Do tell...?


I've done it once.  It is a little larger in diameter than a regular plate and it looks like utter crap when done.  I hate having to resort to using loctite in most cases, but the castle nut is one of those places where it works fine.  The shop demo gun had a DD qd plate that is aluminum.  I run that gun until it is impossible to hold and the blue has not failed me yet.


I just didn't know if it was super hardened or something.
Mine staked ok, but I don't really care how it looks as long as it holds.
I have a punch I ground to a rectangle tip and use that for staking.

http://i245.photobucket.com/albums/gg76/gi57/Misc/P8201981.jpg

http://i245.photobucket.com/albums/gg76/gi57/Misc/P8201982.jpg

http://i245.photobucket.com/albums/gg76/gi57/Misc/P8201983.jpg



This is what I did as well.  Does not look pretty, but it does the job.
Link Posted: 8/20/2011 3:45:15 PM EST
[#20]
+1 locktite. A little locktite and some elbow grease to get the castle nut tight. It won't come loose.
Link Posted: 8/20/2011 3:59:45 PM EST
[#21]
A staking punch and a hammer... less than a buck and does the same as all of the above mentioned.

IF you loctite, do not under any circumstances use red. A very small amount of blue will work. But I vastly prefer staking.
Link Posted: 8/20/2011 5:33:19 PM EST
[#22]
I used a concrete nail as it was the closest thing around when I was doing mine.
Link Posted: 8/20/2011 7:23:26 PM EST
[#23]
You learn something new every day...

I put loctite on mine, and now I can't get it off. I've broken three wrenches trying.
Link Posted: 8/20/2011 7:37:02 PM EST
[#24]
Quoted:
You learn something new every day...

I put loctite on mine, and now I can't get it off. I've broken three wrenches trying.


Barrel blocks to hold tube, torch to heat it, and another wrench.
Link Posted: 8/20/2011 7:39:35 PM EST
[#25]
I've used locktite, staked the threads and staked the traditional way. As far as I'm concerned the buffer tube is part of the lower now.
Link Posted: 8/20/2011 7:46:21 PM EST
[#26]
$5.99 spring loaded punch like mentioned works for me. Much better control than hammer and punch. Just pop it a few times till you get the desired stake.
Link Posted: 8/21/2011 4:08:20 AM EST
[#27]



Quoted:



Quoted:

as said above, but be careful with aluminum sling mount end plates, and dont even try to stake a Magpul ASAP.




Do tell...?


Yes, please clarify. I used an automatic center punch to stake both of mine. It isn't pretty but it works.



 
Link Posted: 8/21/2011 3:29:26 PM EST
[#28]
Is it really necessary to stake the end plate with the castle nut? Had my rifles for how many years now and my castle nut in each are not staked. No issues whatsoever not even a sign that the nut has moved. My 'smith just torqued it nice and tight.
Link Posted: 8/21/2011 4:10:04 PM EST
[#29]
Grind down a broken punch.


Strike with a hammer a couple of times, flow the metal into the castle nut.


Done!
Link Posted: 8/21/2011 4:34:04 PM EST
[#30]
I used a big ass screw driver and a hammer. Not as nice looking as a factory made stake, but it is functional.
Link Posted: 8/21/2011 5:22:28 PM EST
[#31]
Center punch and hammer.........



















 
Link Posted: 8/22/2011 4:57:08 AM EST
[#32]
Quoted:
Is it really necessary to stake the end plate with the castle nut? Had my rifles for how many years now and my castle nut in each are not staked. No issues whatsoever not even a sign that the nut has moved. My 'smith just torqued it nice and tight.


I had one back off on my 6520 at the range even after I torqued it down. Now I stake all of them.
Link Posted: 8/22/2011 4:58:25 AM EST
[#33]
Link Posted: 8/22/2011 5:11:53 AM EST
[#34]
Just in case, how do you remove a staked castle nut?
Link Posted: 8/22/2011 5:20:25 AM EST
[#35]
Quoted:
Just in case, how do you remove a staked castle nut?


I use a punch and a small hobby file to move/remove the displaced metal. The trick is to take your time.

Link Posted: 8/22/2011 6:06:21 AM EST
[#36]
Quoted:
Quoted:

Quoted:
Quoted:
as said above, but be careful with aluminum sling mount end plates, and dont even try to stake a Magpul ASAP.


Do tell...?

Yes, please clarify. I used an automatic center punch to stake both of mine. It isn't pretty but it works.
 


Learn something new every day. Maybe the ones I attempted were hardened a bit more.


I bet the early ones were tougher, the new one I got looks like MIM and was rather soft.

Posted Via AR15.Com Mobile
Link Posted: 8/22/2011 6:27:46 AM EST
[#37]
Quoted:
Is it really necessary to stake the end plate with the castle nut? Had my rifles for how many years now and my castle nut in each are not staked. No issues whatsoever not even a sign that the nut has moved. My 'smith just torqued it nice and tight.


I too have had many rifles and never had one back off, however I do currently stake them as Mr. Murphy llikes to only show up at the wrong time.

Its been my observation that stock mounted slings tend to make this a bigger issue since they are constantly torquing on the RE which can work it lose if not staked.
Link Posted: 8/22/2011 7:02:03 AM EST
[#38]
I bought an auto center punch at harbor freight. Normally $4.99, on sale for $3.99
Link Posted: 8/22/2011 7:13:19 AM EST
[#39]
My staking came out super ugly but who the hell cares? If I had a gun that was a showroom only kind of piece I wouldn't stake it.



Feel free to look at my thread on it awhile back. Someone commented on it that it looks like a retard went crazy with a jack hammer.



We all gotta learn the hard way sometimes!
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