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Thread: Colt buffer tube not installed completely?

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    Colt buffer tube not installed completely?

    I recently bought a preban colt sporter lightweight. While shooting today I started to get a couple failures to go into battery. After changing mags it occurred to me it was a rifle issue. Took the rifle down and found the buffer tube detent had fallen out and was behind the sear block (thanks for the sear block colt). Looking at it compared to my 6920 it appears the buffer tube wasn't installed completely causing the detent to wear through the small amount of tube holding it in place. Am I correct with that assessment? Would simply reinstalling the buffer detent and screwing the buffer tube in some more fix my issue?
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    Last edited by nof555; 12-29-15 at 14:37.

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    Was this a new Colt? Any signs of someone being a YouTube armorer?

    Quote Originally Posted by nof555 View Post
    I recently bought a preban colt sporter lightweight. While shooting today I started to get a couple failures to go into battery. After changing mags it occurred to me it was a rifle issue. Took the rifle down and found the buffer tube detent behind the sear block (thanks colt) had fallen out. Looking at it compared to my 6920 it appears the buffer tube wasn't installed completely causing the detent to wear through the small amount of tube holding it in place. Am I correct with that assessment? Would simply reinstalling the buffer detent and screwing the buffer tube in some more fix my issue?



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    Bought it from the original owner that bought it back in '91. When I asked him if he removed the buffer tube his response wen't something like "I might have to see how an adjustable stock fit". Nice, now need to clean up his mess. Should I replace the tube or just tighten it up? Any idea on where to get a buffer tube detent spring?

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    They come in standard lower parts kits, some even come in "oops" kits designed for people that lose detents and springs.


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    That buffer tube was not installed by the factory.
    All sporter lightweights came with fixed stocks.

    So my guess is the castle nut was not staked properly, if at all and it came loose.

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    It still has a fixed stock. I believe he took off the stock and buffer tube and installed an adjustable stock. When he returned the rifle back to stock he didn't install it correctly. He's a family friend which makes for greater frustration.

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    https://www.google.com/search?q=preb...w=1024&bih=681
    Other than no bayonet lug and the fixed stock, the Lightweight Sporter is identical to the Government Carbine, as far as the examples of both I have owned were concerned.

    YMMV and Colt is not necessarily consistant in their models.Colt Sporter Lightweight is designated as a 6530 I believe. No bayonet lug, A2 stock, rollmarked Sporter Lightweight and the serial number prefix is probably SL.
    https://www.ar15.com/archive/topic.h...f=118&t=281176
    Last edited by RWH24; 12-27-15 at 20:31.
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    Someone modified that. That endplate also has a weird color to it. It almost looks black. In any case I wouldn't be blaming Colt for something that happened on something that is over 20 years old and probably been messed with.



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    Quote Originally Posted by nof555 View Post
    ...... He's a family friend which makes for greater frustration.
    Yeah, I learned the hard way, to only "sell" to family friends.

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    Quote Originally Posted by Iraqgunz View Post
    Someone modified that. That endplate also has a weird color to it. It almost looks black. In any case I wouldn't be blaming Colt for something that happened on something that is over 20 years old and probably been messed with.
    Easy now, I never said colt installed it incorrectly. I love my 6920, I explained the previous owner admitted to removing the buffer tube.

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