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Posted: 12/4/2018 10:14:48 AM EDT
[#1]
I don't think I have ever "torqued" a castle nut, just snugged it with hand pressure. I haven't had any come loose. I hold the lower in my hand and tighten the nut with the wrench.
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Posted: 12/4/2018 10:28:12 AM EDT
[#2]
Quote HistoryQuoted:
I don't think I have ever "torqued" a castle nut, just snugged it with hand pressure. I haven't had any come loose. I hold the lower in my hand and tighten the nut with the wrench. |
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Posted: 12/4/2018 10:29:26 AM EDT
[#3]
Spec is said to be 40 ft lbs.
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Posted: 12/4/2018 10:33:24 AM EDT
[#4]
If you just want to have the tool, there is the Geissele Reaction-Block and who doesn't want more tools?
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Posted: 12/4/2018 10:38:53 AM EDT
[#5]
Just hold it between your knees. Seriously.
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Posted: 12/4/2018 10:48:08 AM EDT
[#6]
Quote HistoryQuoted:
If you just want to have the tool, there is the Geissele Reaction-Block and who doesn't want more tools? |
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Posted: 12/4/2018 11:12:35 AM EDT
[#7]
Guess it's not that important. I'll make some blocks of wood or use the magwell block.
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Posted: 12/4/2018 11:42:59 AM EDT
[#8]
Quote HistoryQuoted:
Guess it's not that important. I'll make some blocks of wood or use the magwell block. |
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Posted: 12/4/2018 11:45:18 AM EDT
[#9]
No... Quality magwell vice blocks themselves can handle it, but they do not support the lower good enough for removing or installing receiver extensions and castle nuts when using the correct torque specs... You could end up damaging the lower.
It's best to clamp the lower in the vise between a set of rubber faced vise jaws in the trigger well selector area, just above the grip. These are the ones that I use. > Link. The rubber face vise jaws work well, but I make sure to tape off the rubber surface every time I use them because the rubber will leave smudge marks on the receiver that can be a pain to clean off. The Geissele Reaction Block is okay too. You just need to insert a magwell vise block into the lower and have someone hold on to it to keep the lower in alignment so that the lower doesn't move in the direction of torque and end up canted in relation to your receiver extension. If someone would just make a jig similar to the one that Colt uses for carbine receiver extensions that would be great. It would probably cost around $500.00 but I would buy one. |
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Posted: 12/4/2018 11:54:38 AM EDT
[#10]
Quote HistoryQuoted:
If you just want to have the tool, there is the Geissele Reaction-Block and who doesn't want more tools? |
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Posted: 12/13/2018 5:02:57 PM EDT
[#11]
See the TM.
I clamp the lower in a padded vise not with a magwell block. |
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Posted: 12/13/2018 8:03:54 PM EDT
[#12]
I used a wheeler upper vise block. If you use a magwell block you're going to be placing majority of the stress on your takedown and pivot lugs. That or clamp the upper between some wood blocks. should do the same thing if you aren't willing to spend the 30 odd dollars.
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Posted: 12/13/2018 8:18:55 PM EDT
[#13]
Quote HistoryQuoted:
See the TM. I clamp the lower in a padded vise not with a magwell block. Remove grip and clamp on the grips interface point on receiver. I use a piece of leather for padding. |
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Posted: 12/16/2018 8:55:52 PM EDT
[#14]
I guess I am a hack. I hit it with a screwdriver @ 90° with 3 lb hammer soft swing. Long time ago.
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Posted: 12/16/2018 9:39:45 PM EDT
[#15]
Yes, well know common commercially built items that have been used and suggested for years do work for what they are intended to do...
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Posted: 12/20/2018 8:05:12 PM EDT
[#16]
Quote HistoryQuoted:
Just hold it between your knees. Seriously. |
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Posted: 12/25/2018 10:04:48 AM EDT
[#17]
Quote HistoryQuoted:
I used a wheeler upper vise block. If you use a magwell block you're going to be placing majority of the stress on your takedown and pivot lugs. That or clamp the upper between some wood blocks. should do the same thing if you aren't willing to spend the 30 odd dollars. |
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Posted: 12/25/2018 10:36:54 PM EDT
[#18]
Quote HistoryQuoted:
I used a wheeler upper vise block. If you use a magwell block you're going to be placing majority of the stress on your takedown and pivot lugs. That or clamp the upper between some wood blocks. should do the same thing if you aren't willing to spend the 30 odd dollars. OP, I’ve used a mag well block almost exclusively for castle nuts over the years. I’ve never precisely measured torque out to 40 ft lbs, but I get them nice and tight using a dedicated wrench, then dual stake. Never had a problem with one working loose nor have I had a problem with damaging anything using the mag block for this purpose. |
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Posted: 12/28/2018 7:51:42 PM EDT
[#19]
I'm kind of surprised nobody has put one of these on the market. But rather than wait, I prefer to roll my own.
 Attached FileIt's UHMW which is ultra slick and non-marring. Originally I planned to deck the top enough to operate a charging handle, but if I ever need to it will only take a minute to open it up.  Attached File Attached FileMaking tools is almost as much fun as using them. DIY FSB block, auto punch modded for roll pins, tapered pins for FCG install, guide block for those tiny set screws for the rear take down mod, a pin like the clevis trick for the front pivot pin install and lower fixtures for milling 80%'ers.  Attached File |
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Posted: 12/28/2018 9:08:59 PM EDT
[#20]
That's BRILLIANT!
Larry |
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Posted: 1/3/2019 2:06:18 AM EDT
[#21]
I use an old ‘90s era USA brand steel 30 round magazine. It’s squashed from the vise but I’ve installed or swapped probably 100 receiver extensions in the last 20 years with it without a single issue.
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Posted: 1/3/2019 10:21:19 PM EDT
[#22]
Quote HistoryQuoted:
I'm kind of surprised nobody has put one of these on the market. But rather than wait, I prefer to roll my own. https://www.AR15.Com/media/mediaFiles/89127/41658_jpeg-788312.JPG It's UHMW which is ultra slick and non-marring. Originally I planned to deck the top enough to operate a charging handle, but if I ever need to it will only take a minute to open it up. https://www.AR15.Com/media/mediaFiles/89127/41655_jpeg-788316.JPG https://www.AR15.Com/media/mediaFiles/89127/41653_jpeg-788317.JPG |
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Posted: 1/3/2019 10:29:01 PM EDT
[#23]
Quote HistoryQuoted: Might you be interested in selling one of those? |
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Posted: 2/1/2019 2:39:19 PM EDT
[#24]
Quote HistoryQuoted: Might you be interested in selling one of those? @DaveP1 @PursuitSS @Alpharomeofifteen @K1rodeoboater If any of you 5 are interested in testing one, let me know. I feel like I'm forgetting a "regular".  Attached File |
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Posted: 2/1/2019 2:41:52 PM EDT
[#25]
Quote HistoryQuoted: @M90A1 might you be interested in testing a prototype? @DaveP1 @PursuitSS @Alpharomeofifteen @K1rodeoboater If any of you 5 are interested in testing one, let me know. I feel like I'm forgetting a "regular". https://www.AR15.Com/media/mediaFiles/89127/44961_jpeg-829354.JPG Do you still have my mailing information? |
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Posted: 2/1/2019 2:46:30 PM EDT
[#26]
Love to.
I'll PM you my info. Thanks |
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Posted: 2/1/2019 5:02:05 PM EDT
[#27]
I’m in.
I’ll test it. |
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Posted: 2/1/2019 7:10:27 PM EDT
[#28]
Appreciate the offer but I gotta decline. Im still in a state of "moving" and likely will be for several months.
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Posted: 2/2/2019 11:29:51 AM EDT
[#29]
I'm about to build out a few lowers. Would test one out and report back if you have a spare.
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Posted: 2/2/2019 5:58:38 PM EDT
[#30]
The mag well can’t handle 40ft. Ibs?
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Posted: 2/2/2019 6:04:34 PM EDT
[#31]
Quote HistoryQuoted:
Just hold it between your knees. Seriously. |
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Posted: 2/9/2019 9:39:07 PM EDT
[#32]
Sorry for the late reply, but I'd love to test one. This just might be the answer to tightening the castle nut to a polymer lower without damaging anything. The polymer lowers do have more flex than the aluminum versions.
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Posted: 2/10/2019 1:32:58 AM EDT
[#33]
Quote HistoryQuoted:
Sorry for the late reply, but I'd love to test one. This just might be the answer to tightening the castle nut to a polymer lower without damaging anything. The polymer lowers do have more flex than the aluminum versions. |
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Posted: 2/10/2019 1:39:52 AM EDT
[#34]
Quote HistoryQuoted:
Yup Quote HistoryQuoted:
Quoted:
Just hold it between your knees. Seriously. A lot of things in life are "not necessary" yet we keep striving to accumulate more. |
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