Posted: 6/20/2015 8:09:30 PM EDT
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This past Christmas I purchased 2 stripped AR 22 receivers from Tactical Machining. I have been slowly buying parts for both AR 22 builds. I now have the parts for 1 complete rifle and half the parts for a second rifle. I need to have both muzzle brakes pinned to be compliant with the new laws. I recently purchased 2 brakes from Brownells that are predrilled and come with the pin. My original intent was to have JoJo's take care of this. Now I'm thinking I might be able to do this myself. Can I just drill this and install the pin? Does the pin or the brake have to be soldered in place? What about epoxy? I do have a drill press but I have very little mechanical ability. Most of my skill set is as a furniture/ cabinet maker.
Mike |
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You do not need to pay someone to pin brakes especially if you bought predrilled brakes.
Install the brakes and get them timed. Then using your drill press run a drill bit down the hole and into the barrel. Do not go too deep. You need to go just deep enough for the pin to drop in. You do not want to drill all the way through. Cut the pin so it is below the surface of the hole. Then you need to weld or silver solder the hole. Then file the weld smooth and hit it with some touch up. If you know someone with a TiG welder that is the best. It makes a nice neat weld. MiG can splatter. You can silver solder it yourself with a Mapp gas torch. |
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Silver solder. Is this the same solder you would use in sweating copper pipe? Silver solder is to expensive for copper pipe. It used to be a tin / lead blend, but I believe they did away with the lead. I have enough of the old blend to last a life time. I do have silver solder too. Mike |
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Quoted:
You do not need to pay someone to pin brakes especially if you bought predrilled brakes. Install the brakes and get them timed. Then using your drill press run a drill bit down the hole and into the barrel. Do not go too deep. You need to go just deep enough for the pin to drop in. You do not want to drill all the way through. Cut the pin so it is below the surface of the hole. Then you need to weld or silver solder the hole. Then file the weld smooth and hit it with some touch up. If you know someone with a TiG welder that is the best. It makes a nice neat weld. MiG can splatter. You can silver solder it yourself with a Mapp gas torch. Does it need to be soldered or can the pin just friction fit in? Mike |
| ^^ Nope they come in rods(14-16" in length). We use these to braze refrigeration copper. Mapp will work(yellow tank-not the blue propane tank) but I find it's a PITA to melt those rods with MaPP gas. We use acetelyne gas(much higher temp). Blue tank won't work, yellow will, acetelyne best. The rods are kinda expensive though. Don't know if you can buy fewer or smaller peices. |
| When I was looking into this for pinning a 14.5 inch barrel the Atf does specify welded or silver soldered. They went so far a to further describe temperature settings. I'm missing a lot of details here but I'd put money that epoxy or a friction fit isn't gonna cut it |
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Quoted: When I was looking into this for pinning a 14.5 inch barrel the Atf does specify welded or silver soldered. They went so far a to further describe temperature settings. I'm missing a lot of details here but I'd put money that epoxy or a friction fit isn't gonna cut it 1100 degrees. luckily the OP only needs to make the state happy this time |
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JOJO's is looking better by the minute Mike.  Yup, I talked to Jody a few weeks ago. If it was just the drilling, I'd probably go for it. Add the soldering or welding and I have to big of a chance of making a mess. Funny thing is I have 2 barrels that need to be pinned and 2 barrels that need to be unpinned. Mike |
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Yea I should add, I braze with silver solder constantly at work, but when it comes to pinning/welding muzzle devices on firearms.....I bring them to JoJo's.
I dont want to mess with adding too much heat/discoloring, drilling to deep, etc. 35 bucks and they'll take care of it. Pretty much one of the only things I dont mind paying the pros to do for me 
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Mile the silver solder you have for plumbing is not the same as you need for steel. The stuff for steel is more like brazing rod. There is a low temp version that melts around 400 degrees or so. You need the stuff that melts at 1200 or so.
If you only have two barrels to do you might just have it done. |
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Quoted: Yup, I talked to Jody a few weeks ago. If it was just the drilling, I'd probably go for it. Add the soldering or welding and I have to big of a chance of making a mess. Funny thing is I have 2 barrels that need to be pinned and 2 barrels that need to be unpinned. Mike Quoted: Quoted: JOJO's is looking better by the minute Mike. Yup, I talked to Jody a few weeks ago. If it was just the drilling, I'd probably go for it. Add the soldering or welding and I have to big of a chance of making a mess. Funny thing is I have 2 barrels that need to be pinned and 2 barrels that need to be unpinned. Mike |
