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AR10 gas block thread repair
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FFL / Dealer  Location: Lake Forest Park Joined: Tue Mar 22, 2011 Posts: 211 Real Name: Tom 
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A customer brought his AR10 in with the broken bolt in the gas block. He had just finished putting it together. This took an hour to repair. I buddy of mine recently mentioned a meme that said," Every 5 minute job is a broken bolt away from being a 3-day ordeal." Or something like that.
I didn't break it, but I fixed it. You do not have the required permissions to view the files attached to this post. |
| Tue Oct 05, 2021 7:06 pm |
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Site Admin   Location: Renton, WA Joined: Sun Mar 13, 2011 Posts: 52588 Real Name: Steve
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Wow. Nicely done, Tom.
Yeah, I can see my life flashing before my eyes as something like that breaks.... _________________ Steve Benefactor Life Member, National Rifle Association Life Member, Second Amendment Foundation Patriot & Life Member, Gun Owners of America Life Member, Citizens Committee for the Right to Keep and Bear Arms Legal Action Supporter, Firearms Policy Coalition Member, NAGR/NFGR Please support the organizations that support all of us. Leave it cleaner than you found it. |
| Tue Oct 05, 2021 7:10 pm |
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Site Supporter   Location: Idaho, Land of the Free Joined: Wed May 1, 2013 Posts: 21811 Real Name: Vick Lagina
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Even machinist/gunsmiths have those moments; tell them about the super hard, slightly curved rear trunnion on my M92 and the several broken drill bits, Tom.
( There's a happy ending or I wouldn't have mentioned it. In comparison I don't think this broken bolt was much of a challenge for TP) _________________ “Finding ‘common ground’ with the thinking of evil men is a fool’s errand” ~ Herschel Smith "The “A return to First Principles in a Republic is sometimes caused by simple virtues of a single man. His good example has such an influence that the good men strive to imitate him, and the wicked are ashamed to lead a life so contrary to his example. Before all else, be armed!” ~ Niccolo Machiavelli Láodòng zhèng zhūwèi zìyóu FJB I wouldn't F Kamala with Joe's dick |
| Tue Oct 05, 2021 7:41 pm |
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Site Supporter  Location: Oly Joined: Thu Oct 4, 2012 Posts: 1426
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I don't mean any disrespect, but this seems like a bad use of resources from the outside. Maybe I just don't understand the value of that gasblock, but it looks like a $20 part.
For a problem with a $20 part, I'd just cut it off as quickly as I could and replace it. If you have an hour tied up in it, what did that job cost trying to save the part? If you're $100/hr, you could have bought a lot of gasblocks for that. I'd have put it in a vise like you did there, use a cut off wheel at the thinnest part of the block that is exposed and grind a slot almost all the way thru. Then, I'd whack the meatiest part of the block with a punch and hammer a couple of times, cracking it the rest of the thru on that newly ground groove. This would also negate the risk of knocking the corners off my mill when cutting into something other than flat and square. If you had 10 minutes into that, it's probably more because you forgot what drawer you put your cutoff wheels that fit your Foredom. I guess if your customer just had to have that gasblock, maybe just replacing the set screw was worth it, but my financial calculator also puts a high value on time. |
| Tue Oct 05, 2021 8:53 pm |
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Site Supporter / FFL Dealer  Location: Tacoma, Washington Joined: Fri Nov 21, 2014 Posts: 8526
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Stokes wrote: I don't mean any disrespect, but this seems like a bad use of resources from the outside. Maybe I just don't understand the value of that gasblock, but it looks like a $20 part. For a problem with a $20 part, I'd just cut it off as quickly as I could and replace it. If you have an hour tied up in it, what did that job cost trying to save the part? If you're $100/hr, you could have bought a lot of gasblocks for that. I'd have put it in a vise like you did there, use a cut off wheel at the thinnest part of the block that is exposed and grind a slot almost all the way thru. Then, I'd whack the meatiest part of the block with a punch and hammer a couple of times, cracking it the rest of the thru on that newly ground groove. This would also negate the risk of knocking the corners off my mill when cutting into something other than flat and square. If you had 10 minutes into that, it's probably more because you forgot what drawer you put your cutoff wheels that fit your Foredom. I guess if your customer just had to have that gasblock, maybe just replacing the set screw was worth it, but my financial calculator also puts a high value on time. BLACK HAMMER ARMS Type 07 Class 2 NFA Dealer http://www.blackhammerarms.com http://www.facebook.com/blackhammerarms https://www.instagram.com/blackhammerarms GLOCK Certified Armourer _________________ BLACK HAMMER ARMS Buy A Suppressor http://www.silencershop.com/blackhammerarms Type 7 Class 2 SOT NFA Dealer 1911 Pistolsmithing Firearm Refinishing GLOCK Certified Armorer CMMG Authorized Dealer NEMO Arms Authorized Dealer http://www.blackhammerarms.com http://www.facebook.com/blackhammerarms https://www.instagram.com/blackhammerarms/ |
| Tue Oct 05, 2021 9:24 pm |
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