AR-15 Bolt Carrier Gas Key screw failure

[1969912 0]

One of the screws used to attach the gas key to the bolt carrier on my Colt Sporter (7.62x39) failed, resulting in feed failures.

Is this a common problem? How can it be prevented?

Thanks,

Jim

"Once we got to the point where twenty/something's needed a place on the corner that changed the oil in their cars we were doomed . . ."
-NickDG

[JohnRich 4]

I've never heard of that happening before. How did it fail? Did it shear off? There really isn't any force put on that - it simply holds the gas tube in place to line-up with the tube in the forearm. And the screws should be staked into place, to keep them from backing-out from the vibration of recoil.

There are some AR-15 website forums on the net. You would tap more experience there.

What the heck are you doing fooling around with 7.62x39 in an AR, anyway?

[1969912 0]

Hi JohnRich,

Colt made the Sporter Lightweight in 7.62x39 back in the '90's, maybe earlier. Bought it new, preban. ~$500 in '93. Something for the collection, I guess.

After having some feed failures, I found that one screw was broken where it enters the carrier. They were factory staked and had never been removed. I assume it is a result of fatigue at the thread root or perhaps the factory overtorqued the screws I have not seen a good analysis of the problem on the web and thought someone in that "build an AR-15" thread might have some ideas, I don't think it is limited to 7.62 variants. Anyway, thanks. Will fix it this weekend and go from there.

Thanks,

Jim

"Once we got to the point where twenty/something's needed a place on the corner that changed the oil in their cars we were doomed . . ."
-NickDG

[FallRate 0]

This reminds me of reading Playboy as an adolescent. In the letters section, I assumed there would be "Best Position?", "Easiest Way to Hook-Up?", "Is Six Inches Better Than Average?", etc. Instead, I mostly found questions concerning the proper consumption of french cheeses and overly detailed questions concerning stereo speakers.

Not that the question you have posed is in any way out of line...just not the kind of dialogue I would expect to find on the subject of guns in SC. It's nice to be surprised every once in a while.

Does anyone know if Asa Baber skydives?

FallRate

[Badgerord 0]

The screw breackage is not common, but does occur. It is most likley that it was ham fisted at the factory.


Getting the broken piece to screw out will be the hardest part, but can be replaced. When replacing, don't excede the torque limit of 35-40 inch- pounds (per Army TM 9-1005-319-23&P page 3-27)

[1969912 0]

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Speakers Corner
A Soap Box in Cyber Space. This is the place to discuss politics, guns, religion and any other topic you feel the need to address from your soap box. Debates may get heated in here but the forum rules apply as everywhere else.

Quote

"Best Position?", "Easiest Way to Hook-Up?", "Is Six Inches Better Than Average?"

is probably discussed more in The Bonfire than in Playboy.

"Once we got to the point where twenty/something's needed a place on the corner that changed the oil in their cars we were doomed . . ."
-NickDG

[1969912 0]

Will do.

Thanks

"Once we got to the point where twenty/something's needed a place on the corner that changed the oil in their cars we were doomed . . ."
-NickDG

[kenneth21441 0]

Buy a AK or an UZI,

The Ak has worked for me for years with no problems other then feeding that monster.

Never had an issue with parts going bad and she fires in the sand. Take that AR in the sand and watch her jam up on you in a heart beat. I had to use that piece of crap in the Army and would only trust it if i could use it as a club to hit someone with.

Kenneth Potter
FAA Senior Parachute Rigger
Tactical Delivery Instructor (Jeddah, KSA)
FFL Gunsmith

[1969912 0]

Yep, the AK would be my choice if I could only have one. Love to have an UZI.

"Once we got to the point where twenty/something's needed a place on the corner that changed the oil in their cars we were doomed . . ."
-NickDG

[kenneth21441 0]

Id sell you mine if I could.

Kenneth Potter
FAA Senior Parachute Rigger
Tactical Delivery Instructor (Jeddah, KSA)
FFL Gunsmith

[JohnRich 4]

Quote

This reminds me of reading Playboy as an adolescent. In the letters section, I assumed there would be "Best Position?", "Easiest Way to Hook-Up?", "Is Six Inches Better Than Average?", etc. Instead, I mostly found questions concerning the proper consumption of french cheeses and overly detailed questions concerning stereo speakers.

Not that the question you have posed is in any way out of line...just not the kind of dialogue I would expect to find on the subject of guns in SC.

This is a completely non-political topic about guns.

However, some of those Bonfire folks are so paranoid about gun stuff, that even a discussion of some firearms technical maintenance frightens them.

So, the moderators have deemed that all gun subjects should be here, even if they are apolitical. Silly, but true.

That's the kind of reaction that guns produce in some people. And it only takes a few anti-gun nuts, to cause a silly rule to be put in place for everyone. Common sense isn't involved much.

But over in Bonfire, feel free to talk about homosexual butt fucking all you want. No one seems to object to that topic.

[DrewEckhardt 0]

Quote

Buy a AK or an UZI,

The Ak has worked for me for years with no problems other then feeding that monster.

Never had an issue with parts going bad and she fires in the sand. Take that AR in the sand and watch her jam up on you in a heart beat. I had to use that piece of crap in the Army and would only trust it if i could use it as a club to hit someone with.

The AK shoots minute of man.

An AR15 configured for recreational use shoots minute of tin-can, making it a lot more effective against the soda cans and paper targets most of us shoot.

[JohnRich 4]

Quote

The AK shoots minute of man.

Not beyond 300 yards or so. The AR is good for that out to 600 yards.

[airtwardo 7]

Quote

Quote

The AK shoots minute of man.

Not beyond 300 yards or so. The AR is good for that out to 600 yards.

And the UZI out to what...say 60 YARDS!

~ If you choke a Smurf, what color does it turn? ~

[JohnRich 4]

Quote

And the UZI out to what...say 60 YARDS!

Yeah. I'd take one shot from an M14 at 600 yards, against someone with a 30-round magazine from an Uzi. And I'd win.

[livetofall 0]

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http://www.metacafe.com/watch/258574/500_round_machine_gun/

I got info on how to get one..base model semi aout with 165 drum $995..22 long sure is cheap!
PM me if you like

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