User Panel
User Panel
User Panel
|
Posted: 8/31/2024 4:13:33 PM EDT
[Last Edit: bionicmonkey]
Ended up with s7 in 1/2" bar and O1 in 3/8 round due to availability. Shouldnt make a lot of difference except in the quenching.
 Attached FileS7 bar - rough cut to a little over 1/2x1/2. First up some milling operations to reduce to actually 1/2 by 1/2 then take the height down to 3/8.  Attached FileYou can see here how a printed lever compares to the shaped end  Attached FileNext up shaping operations begin  Attached FileThis stuff is hard on the mini mill for sure - about the same as stainless in that regard. |
|
|
|
SC, USA
|
Posted: 8/31/2024 4:46:22 PM EDT
[#1]
Correct me if I'm wrong, but judging by the lever on the last photo, is it a, let's say, super safe selector?
|
|
|
|
Posted: 8/31/2024 5:27:56 PM EDT
[Last Edit: bionicmonkey]
[#2]
Yeah. A safety selector ;)
 Attached FileMilling complete, coming off the bar  Attached FileCompararive to printed. Needs some smoothing but generally complete My design here is deliberately a bit straighter for easier milling. Next up - the selector itself |
|
|
|
SC, USA
|
Posted: 8/31/2024 6:01:34 PM EDT
[#3]
Very nice. I have a couple machined from tool steel. They're fun 😬
|
|
|
|
Posted: 8/31/2024 6:05:16 PM EDT
[Last Edit: bionicmonkey]
[#4]
 Attached FileMilling the selector requires a different setup. Have some O1 tool steel here ready to go  Attached FileCutting begins |
|
|
|
|
Posted: 8/31/2024 6:54:33 PM EDT
[#5]
|
|
|
|
|
Posted: 8/31/2024 7:13:01 PM EDT
[#6]
|
|
|
|
SC, USA
|
Posted: 8/31/2024 7:29:03 PM EDT
[#7]
This ain't your daddy's safety selector. It's one of those special ones. It's one of those that isn't just safe it's super safe!
|
|
|
|
Posted: 8/31/2024 9:54:08 PM EDT
[Last Edit: bionicmonkey]
[#8]
 Attached FileThe all imporant small diag cuts to make the channel shape. I found these 2mm mills with 4mm shaft which fit in a 5/32 collet just fine. Time for the 3 slots of the trigger bar  Attached File Attached File Attached File |
|
|
|
|
Posted: 8/31/2024 10:41:10 PM EDT
[Last Edit: bionicmonkey]
[#9]
 Attached FilePenultimate cut then shunt left and finish it.  Attached File Attached FileNeed some minor finish work and fitment testing and then the fun part with heat treatment. |
|
|
|
AZ, USA
|
Posted: 8/31/2024 10:50:44 PM EDT
[#10]
How are you planning on heat treating this?
|
|
|
|
Posted: 8/31/2024 11:01:16 PM EDT
[Last Edit: bionicmonkey]
[#11]
Quote HistoryOriginally Posted By brownbomber: How are you planning on heat treating this? propane torch.  e.g. like this guy https://www.bing.com/videos/riverview/relatedvideo?&q=heat+treat+o1+steel+blowtorch&&mid=8F359EBFECCB81D4E98D8F359EBFECCB81D4E98D&&FORM=VRDGAR then I have some caswell black oxide and sealer once its tempered (400 in the toaster oven should be ok for both the s7 and o1) |
|
|
|
AZ, USA
|
Posted: 8/31/2024 11:16:10 PM EDT
[#12]
Quote HistoryOriginally Posted By bionicmonkey: propane torch. e.g. like this guy https://www.bing.com/videos/riverview/relatedvideo?&q=heat+treat+o1+steel+blowtorch&&mid=8F359EBFECCB81D4E98D8F359EBFECCB81D4E98D&&FORM=VRDGAR then I have some caswell black oxide and sealer once its tempered (400 in the toaster oven should be ok for both the s7 and o1) Quote HistoryOriginally Posted By bionicmonkey: Originally Posted By brownbomber: How are you planning on heat treating this? propane torch. e.g. like this guy https://www.bing.com/videos/riverview/relatedvideo?&q=heat+treat+o1+steel+blowtorch&&mid=8F359EBFECCB81D4E98D8F359EBFECCB81D4E98D&&FORM=VRDGAR then I have some caswell black oxide and sealer once its tempered (400 in the toaster oven should be ok for both the s7 and o1) I wouldn't recommend heat treating anything other than a simple carbon steel with a torch. Alloy steels and tool steels have alloy carbides that take a significant amount of time to fully dissolve (like 15 minutes for those small parts), and they are also prone to cracking when heated rapidly. Rapid heating also pushes up the AC3 temperature. S7 also decarburizes easily in air, due to the high silicon content. |
|
|
|
Posted: 9/1/2024 12:02:36 AM EDT
[Last Edit: bionicmonkey]
[#13]
 Attached FileAll cleaned up...and as nice as it looks - willing to lose it for science since this isnt any harder than my prior 316 stainless builds until hardened, and i dont have a more controlled device (eg kiln) ETA - will admit, im a lot less concerned about the O1 than the S7. not sure how good my treatment will be, but the temper will be good and i just want to be ON the rockwell C chart. |
|
|
|
|
Posted: 9/1/2024 12:34:55 AM EDT
[#14]
Forgive me for asking.....what firearm is this safety for ??
I'm just having a hard time envisioning it fitting into an AR lower. . |
|
|
|
|
Posted: 9/1/2024 12:47:06 AM EDT
[Last Edit: bionicmonkey]
[#15]
Quote HistoryOriginally Posted By IdahoPCCinc: Forgive me for asking.....what firearm is this safety for ?? I'm just having a hard time envisioning it fitting into an AR lower. . Not sure if serious  Attached Filegoogle up hoffman super safety. its a cross-bolt safety rather than a selector style. |
|
|
|
|
Posted: 9/1/2024 3:00:46 AM EDT
[#16]
Quote HistoryOriginally Posted By bionicmonkey: Not sure if serious https://www.ar15.com/media/mediaFiles/56039/1000003576_jpg-3310304.JPG google up hoffman super safety. its a cross-bolt safety rather than a selector style. Thanks....now I feel dumb. I was stuck trying to figure it out as a lever, and how it would work in a lower. But in my own defense....I've never dealt with any of the cross bolt safeties on a AR lower. Nice job on the fab work. . |
|
|
|
MI, USA
|
Posted: 9/1/2024 2:07:38 PM EDT
[#17]
just got to my shop to work on mine, pull the upper off and see a MBT
|
|
|
|
Posted: 9/1/2024 2:29:46 PM EDT
[Last Edit: bionicmonkey]
[#18]
Quote HistoryOriginally Posted By jm0502: just got to my shop to work on mine, pull the upper off and see a MBT Yeah.. mbt is my next project. Heres the milling fixture i setup, was all ready to go when i heard GMR refunded their mbts due to a problem- waiting to see what their problem is and if its relevant to what i was going to do. I have the gel caswell black oxide and sealer so i can both seal my safety and also refinish the cut in the mbt. It will be interesting to see if the mbt was hardened and if so to what level tho...  Attached File |
|
|
|
|
Posted: 9/1/2024 2:39:29 PM EDT
[#19]
Quote HistoryOriginally Posted By bionicmonkey: Yeah.. mbt is my next project. Heres the milling fixture i setup, was all ready to go when i heard GMR refunded their mbts due to a problem- waiting to see what their problem is and if its relevant to what i was going to do. I have the gel caswell black oxide and sealer so i can both seal my safety and also refinish the cut in the mbt. It will be interesting to see if the mbt was hardened and if so to what level tho... https://www.ar15.com/media/mediaFiles/56039/1000003529_jpg-3310662.JPG I was just talking to him the other day and he has fixed the problem, but I don’t remember exactly what it was. I’m impressed with your ability to make that, I know I would spend exponentially more in labor and supplies than just buying one…or the many I already have! |
|
|
|
MI, USA
|
Posted: 9/1/2024 3:14:37 PM EDT
[Last Edit: jm0502]
[#20]
Quote HistoryOriginally Posted By bionicmonkey: Yeah.. mbt is my next project. Heres the milling fixture i setup, was all ready to go when i heard GMR refunded their mbts due to a problem- waiting to see what their problem is and if its relevant to what i was going to do. I have the gel caswell black oxide and sealer so i can both seal my safety and also refinish the cut in the mbt. It will be interesting to see if the mbt was hardened and if so to what level tho... https://www.ar15.com/media/mediaFiles/56039/1000003529_jpg-3310662.JPG What needs to be milled on it? |
|
|
|
Posted: 9/1/2024 3:53:06 PM EDT
[#21]
Quote HistoryOriginally Posted By NoImpactNoIdea: I was just talking to him the other day and he has fixed the problem, but I don’t remember exactly what it was. I’m impressed with your ability to make that, I know I would spend exponentially more in labor and supplies than just buying one…or the many I already have! Quote HistoryOriginally Posted By NoImpactNoIdea: Originally Posted By bionicmonkey: Yeah.. mbt is my next project. Heres the milling fixture i setup, was all ready to go when i heard GMR refunded their mbts due to a problem- waiting to see what their problem is and if its relevant to what i was going to do. I have the gel caswell black oxide and sealer so i can both seal my safety and also refinish the cut in the mbt. It will be interesting to see if the mbt was hardened and if so to what level tho... https://www.ar15.com/media/mediaFiles/56039/1000003529_jpg-3310662.JPG I was just talking to him the other day and he has fixed the problem, but I don’t remember exactly what it was. I’m impressed with your ability to make that, I know I would spend exponentially more in labor and supplies than just buying one…or the many I already have! yeah, i'm hoping he posts a pic at some point - curious if it was just how he cut the MBT's or something intrinsic about the MBT that didnt like being super safe or what. and yes, I could have bought 3 or 4 already with the money i've spent on milling thingamabobs - more of a learning experience than anything else. no way would anyone do this in quantity on a manual mill |
|
|
|
|
Posted: 9/1/2024 3:54:19 PM EDT
[#22]
Quote HistoryOriginally Posted By jm0502: What needs to be milled on it? like a regular trigger the tail needs to be thinned side to side so it can slot into the safety selector grooves. in my fixture that is the upper left corner essentially. |
|
|
|
MI, USA
|
Posted: 9/1/2024 4:07:12 PM EDT
[#23]
Quote HistoryOriginally Posted By bionicmonkey: yeah, i'm hoping he posts a pic at some point - curious if it was just how he cut the MBT's or something intrinsic about the MBT that didnt like being super safe or what. and yes, I could have bought 3 or 4 already with the money i've spent on milling thingamabobs - more of a learning experience than anything else. no way would anyone do this in quantity on a manual mill I have a Y axis lathe and this would still be difficult to make on it. |
|
|
MI, USA
|
Posted: 9/1/2024 6:22:35 PM EDT
[#24]
I'm cheating compared to you
 
|
|
|
|
Posted: 9/1/2024 8:25:43 PM EDT
[Last Edit: bionicmonkey]
[#25]
well now, that's one way to solve that problem
 looks really nice!is there a small ramp somewhere for safe or is it super safe all the time? |
|
|
|
MI, USA
|
Posted: 9/1/2024 9:00:56 PM EDT
[#26]
Quote HistoryOriginally Posted By bionicmonkey: well now, that's one way to solve that problem looks really nice!is there a small ramp somewhere for safe or is it super safe all the time? That I'm not sure of yet. This is the 2 position one, I made the slot bigger to account for the ball nose endmill |
|
|
|
Posted: 9/2/2024 12:02:05 AM EDT
[Last Edit: bionicmonkey]
[#27]
also.. make sure you have a low shelf lower - the lever can bump into the shelf if high shelf.
ETA. if that occurs during your installation testing you'll find when you pull the bolt fully to the rear it wedges there and needs a tap to release. no bueno. |
|
|
|
|
Posted: 9/2/2024 2:07:35 PM EDT
[Last Edit: bionicmonkey]
[#28]
Sorry, no exciting 'in progress' pics or fire in the can pics (although i will say it was cool)
Heres the general setup. Screwdriver in the back has a magnet tip so its the tester. heat source is a small propane torch. Tried a smaller butane torch but with the breeze it just wasnt happening.  Attached File Attached FileHere is the part after the quench.  Attached FileAnd the lever doing its air quench.. (s7) waiting for 150 Everything is in the toaster over now baking up at 400 |
|
|
|
|
Posted: 9/2/2024 4:09:56 PM EDT
[Last Edit: j3_]
[#29]
Is there some info or video on the actual mechanical function of this selector design? Thanks. It looks like it would need a lot of fitting for function because of the so many tolerances of an AR.
What oil was used for quenching? |
|
|
|
|
Posted: 9/2/2024 5:40:42 PM EDT
[Last Edit: bionicmonkey]
[#30]
I think hoffman has a vid on function. Its much like the rare breed in effect.
I used Canola for the quench based on yoo toob vids i watched to become an expert of metallurgy this morning. Final result after temper, wire wheel and then caswell oxide coating and sealer  Attached File Attached FileNice and matte black. Rockwell C s/b around 58- 60 but i cant validate. |
|
|
|
MI, USA
|
Posted: 9/2/2024 5:51:10 PM EDT
[Last Edit: jm0502]
[#31]
Quote HistoryOriginally Posted By bionicmonkey: I think hoffman has a vid on function. Its much like the rare breed in effect. I used Canola for the quench based on yoo toob vids i watched to become an expert of metallurgy this morning. Final result after temper, wire wheel and then caswell oxide coating and sealer https://www.ar15.com/media/mediaFiles/56039/1000003592_jpg-3311797.JPG https://www.ar15.com/media/mediaFiles/56039/1000003593_jpg-3311800.JPG Nice and matte black. Rockwell s/b around 58- 60 but i cant validate. Turned out great. Just got mine finished. Safety does work. Functions perfectly. I'm just going to nitride this one. Fixture for the trigger  |
|
|
|
Posted: 9/2/2024 6:33:42 PM EDT
[#32]
Quote HistoryOriginally Posted By jm0502: Turned out great. Just got mine finished. Safety does work. Functions perfectly. I'm just going to nitride this one. Fixture for the trigger https://i.imgur.com/nuTUzYe.jpg JM you are a mad man, that's awesome! |
|
|
|
MI, USA
|
Posted: 9/2/2024 6:44:00 PM EDT
[#33]
Quote HistoryOriginally Posted By bionicmonkey: JM you are a mad man, that's awesome! Quote HistoryOriginally Posted By bionicmonkey: Originally Posted By jm0502: Turned out great. Just got mine finished. Safety does work. Functions perfectly. I'm just going to nitride this one. Fixture for the trigger https://i.imgur.com/nuTUzYe.jpg JM you are a mad man, that's awesome! What I've done is simple compared to you. |
|
|
MI, USA
|
Posted: 9/4/2024 7:08:20 PM EDT
[#34]
Did you test fire yours?
|
|
|
|
Posted: 9/5/2024 8:41:58 PM EDT
[#35]
I never had any desire to make one, but I do like a challenge.
Nice work guys. I love seeing the different approaches to the same problem with different options available. |
|
|
|
SC, USA
|
Posted: 9/5/2024 10:04:14 PM EDT
[#36]
Quote HistoryOriginally Posted By j3_: Is there some info or video on the actual mechanical function of this selector design? There may be other videos, but here's one that I saw and thought did a pretty good job. https://youtu.be/KIxsnh2fFTo |
|
|
MI, USA
|
Posted: 9/11/2024 5:26:31 PM EDT
[#37]
Quote HistoryOriginally Posted By j3_: Is there some info or video on the actual mechanical function of this selector design? Thanks. It looks like it would need a lot of fitting for function because of the so many tolerances of an AR. What oil was used for quenching? @j3_  Hoffman Super Safety Function |
|
|
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.
Attached File
Attached File
