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The Range
Rifle & Shotgun Discussion
AR trouble shooting - repair suggestions
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<blockquote data-quote="greg1996zz" data-source="post: 3119480" data-attributes="member: 8278"><p>I have a DPMS 5.56 carbine that has been 100% reliable for many years. A couple of days ago I fired about 30 rounds and then it stopped extracting shells and the cases were stuck in the chamber. I had bang the butt on the bench while pulling the charging handle to get the cases out. Did this about 20 more times before going home.</p><p></p><p>I hoped the problem was simply the old 1983 Malaysian suplus ammo that I using. I inspected the gun, gave it a thorough cleaning and went back to the range today using Winchester ammo. Same problem, except I could, with some difficulty, extract the spent cases with just pulling the charging handle. I shot a couple of rounds while just looking at the bolt and it does not move at all. i.e. it's not short stroking. It's like the gas has just suddenly been turned off. The gun went from perfect to non-functional in one shot.</p><p></p><p>So, here's what I've inspected:</p><ul> <li data-xf-list-type="ul">gas block is secure and gas tube pin is in place</li> <li data-xf-list-type="ul">no visible damage to gas tube.</li> <li data-xf-list-type="ul">gas key secure and free of obstruction</li> <li data-xf-list-type="ul">no visible damage to bolt or lugs - gas rings look fine.</li> <li data-xf-list-type="ul">no visible issues with the carrier</li> <li data-xf-list-type="ul">chrome lined chamber/bore are clean - no scratches, rust, pits, etc.</li> </ul><p>Before the problem started I changed the standard A2 buttstock for a Magpul fixed stock, but I did not have to mess with the buffer tube or buffer to do this.... it's just one screw to make the swap. Nonetheless, I pulled out the buffer spring and buffer and they look fine.</p><p></p><p>Suggestions? What else can I check? Stuff breaks, i can live with that, but not knowing what the problem is drives me nuts.</p><p></p><p>Alternatively, who would you take the gun to in the OKC area to fix it? </p><p></p><p>I'm pretty handy, but I'm not going to plays where's Waldo and randomly replace one item at a time hoping to figure it out.</p><p></p><p>Thanks.</p></blockquote><p></p>
[QUOTE="greg1996zz, post: 3119480, member: 8278"] I have a DPMS 5.56 carbine that has been 100% reliable for many years. A couple of days ago I fired about 30 rounds and then it stopped extracting shells and the cases were stuck in the chamber. I had bang the butt on the bench while pulling the charging handle to get the cases out. Did this about 20 more times before going home. I hoped the problem was simply the old 1983 Malaysian suplus ammo that I using. I inspected the gun, gave it a thorough cleaning and went back to the range today using Winchester ammo. Same problem, except I could, with some difficulty, extract the spent cases with just pulling the charging handle. I shot a couple of rounds while just looking at the bolt and it does not move at all. i.e. it's not short stroking. It's like the gas has just suddenly been turned off. The gun went from perfect to non-functional in one shot. So, here's what I've inspected: [LIST] [*]gas block is secure and gas tube pin is in place [*]no visible damage to gas tube. [*]gas key secure and free of obstruction [*]no visible damage to bolt or lugs - gas rings look fine. [*]no visible issues with the carrier [*]chrome lined chamber/bore are clean - no scratches, rust, pits, etc. [/LIST] Before the problem started I changed the standard A2 buttstock for a Magpul fixed stock, but I did not have to mess with the buffer tube or buffer to do this.... it's just one screw to make the swap. Nonetheless, I pulled out the buffer spring and buffer and they look fine. Suggestions? What else can I check? Stuff breaks, i can live with that, but not knowing what the problem is drives me nuts. Alternatively, who would you take the gun to in the OKC area to fix it? I'm pretty handy, but I'm not going to plays where's Waldo and randomly replace one item at a time hoping to figure it out. Thanks. [/QUOTE]
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