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Posted: 10/11/2015 10:46:46 AM EDT
I had my son breakdown our 6920 for cleaning, and reassemble it after lubrication. When he was finished he had a couple parts leftover and couldn't remember where they went.  I myself don't know either, and don't recall seeing them before. They look like some type of detent and spring, but I can't see where they would go. The rifle seems to be functioning fine without them. I need some help identifying where these parts belong please.
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| Did he take off the receiver end plate or the pistol grip? That looks like the spring (although that looks short) under it that captures the lower retaining pin and the block looks like the piece the slides between the buffer tube and end plate to keep it aligned. |
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Quoted:
Did he take off the receiver end plate or the pistol grip? That looks like the spring (although that looks short) under it that captures the lower retaining pin and the block looks like the piece the slides between the buffer tube and end plate to keep it aligned. Yes, he did take the end plate, grip, buffer tube, etc... off. You mentioned the short spring, and I'm wondering if he mixed up a couple of the detent springs. I'll give it a second look. Any idea where that shorter spring might go? The rear takedown pin seems to be much easier to pop out now than before, guess i'll start there. Thanks for the info on the block, I think that is spot on. Thanks for your help, much appreciated. |
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That rectangular piece looks like the key that comes with the Magpul ASAP sling plate. Do you have one of those installed? Spring is too short to be the rear detent spring, but it also looks like it's broken. Bingo! That is the key for the Magpul sling plate and it is installed now. The spring is indeed a broken rear detent spring, which explains why it was so much easier to pop out now. Thank you guys for helping me diagnose my parts issue. You guys are awesome! 
Funny, when I asked my boy about the broken spring I got the proverbial teenage response, "I dunno what happened". lol Anywho, cheap and easy to replace. Thanks again. |
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Quoted:
Yes, he did take the end plate, grip, buffer tube, etc... off. You mentioned the short spring, and I'm wondering if he mixed up a couple of the detent springs. I'll give it a second look. Any idea where that shorter spring might go? The rear takedown pin seems to be much easier to pop out now than before, guess i'll start there. Thanks for the info on the block, I think that is spot on. Thanks for your help, much appreciated. Quoted:
Quoted:
Did he take off the receiver end plate or the pistol grip? That looks like the spring (although that looks short) under it that captures the lower retaining pin and the block looks like the piece the slides between the buffer tube and end plate to keep it aligned. Yes, he did take the end plate, grip, buffer tube, etc... off. You mentioned the short spring, and I'm wondering if he mixed up a couple of the detent springs. I'll give it a second look. Any idea where that shorter spring might go? The rear takedown pin seems to be much easier to pop out now than before, guess i'll start there. Thanks for the info on the block, I think that is spot on. Thanks for your help, much appreciated. Just out of curiosity - why are you guys taking those parts off for cleaning? |
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Quoted:
Just out of curiosity - why are you guys taking those parts off for cleaning? Quoted:
Quoted:
Quoted:
Did he take off the receiver end plate or the pistol grip? That looks like the spring (although that looks short) under it that captures the lower retaining pin and the block looks like the piece the slides between the buffer tube and end plate to keep it aligned. Yes, he did take the end plate, grip, buffer tube, etc... off. You mentioned the short spring, and I'm wondering if he mixed up a couple of the detent springs. I'll give it a second look. Any idea where that shorter spring might go? The rear takedown pin seems to be much easier to pop out now than before, guess i'll start there. Thanks for the info on the block, I think that is spot on. Thanks for your help, much appreciated. Just out of curiosity - why are you guys taking those parts off for cleaning? I recently had the unpleasant experience of speaking to a guy who takes out the pivot pin and detent and spring for cleaning.
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Yeah, your gun and your son.... but I'd go easy on the detail stripping of a gun like that. Especially if you guys might use it for home defence. The way that detent spring is broken it looks like the end plate was forced on which bent the spring. Then the spring was snipped??? There are a couple other parts that, if reassembled in such a fashion, may cause more problems. Check the trigger spring and selector spring as starters. Anyway, glad it's back together right. Sounds like a fun father son project. |
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Quoted:
Yeah, your gun and your son.... but I'd go easy on the detail stripping of a gun like that. Especially if you guys might use it for home defence. The way that detent spring is broken it looks like the end plate was forced on which bent the spring. Then the spring was snipped??? There are a couple other parts that, if reassembled in such a fashion, may cause more problems. Check the trigger spring and selector spring as starters. Anyway, glad it's back together right. Sounds like a fun father son project. I've had it a few years now and felt now was the time to thoroughly clean it with a sonic cleaner. Also, I wanted my son to learn more about the engineering and mechanics involved with the AR platform, so I thought breaking it all down, cleaning it, and reassemble would be a great way to get started. To his credit, he got 99% of it right and together with no help from me. He wants to be an engineer and hopefully land a job in the firearms field one day after he's out of the service. He is completely fascinated with the engineering behind the AR, and wants to know more about Eugene Stoner. Any good reads out there about the man that might interest him? |
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I've had it a few years now and felt now was the time to thoroughly clean it with a sonic cleaner. Also, I wanted my son to learn more about the engineering and mechanics involved with the AR platform, so I thought breaking it all down, cleaning it, and reassemble would be a great way to get started. To his credit, he got 99% of it right and together with no help from me. He wants to be an engineer and hopefully land a job in the firearms field one day after he's out of the service. He is completely fascinated with the engineering behind the AR, and wants to know more about Eugene Stoner. Any good reads out there about the man that might interest him? Quoted:
Quoted:
Yeah, your gun and your son.... but I'd go easy on the detail stripping of a gun like that. Especially if you guys might use it for home defence. The way that detent spring is broken it looks like the end plate was forced on which bent the spring. Then the spring was snipped??? There are a couple other parts that, if reassembled in such a fashion, may cause more problems. Check the trigger spring and selector spring as starters. Anyway, glad it's back together right. Sounds like a fun father son project. I've had it a few years now and felt now was the time to thoroughly clean it with a sonic cleaner. Also, I wanted my son to learn more about the engineering and mechanics involved with the AR platform, so I thought breaking it all down, cleaning it, and reassemble would be a great way to get started. To his credit, he got 99% of it right and together with no help from me. He wants to be an engineer and hopefully land a job in the firearms field one day after he's out of the service. He is completely fascinated with the engineering behind the AR, and wants to know more about Eugene Stoner. Any good reads out there about the man that might interest him? A better way to learn, instead of detail stripping, would be to let him build his own. There really is no reason to detail strip for cleaning. |
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Quoted:
A better way to learn, instead of detail stripping, would be to let him build his own. There really is no reason to detail strip for cleaning. Quoted:
Quoted:
Quoted:
Yeah, your gun and your son.... but I'd go easy on the detail stripping of a gun like that. Especially if you guys might use it for home defence. The way that detent spring is broken it looks like the end plate was forced on which bent the spring. Then the spring was snipped??? There are a couple other parts that, if reassembled in such a fashion, may cause more problems. Check the trigger spring and selector spring as starters. Anyway, glad it's back together right. Sounds like a fun father son project. I've had it a few years now and felt now was the time to thoroughly clean it with a sonic cleaner. Also, I wanted my son to learn more about the engineering and mechanics involved with the AR platform, so I thought breaking it all down, cleaning it, and reassemble would be a great way to get started. To his credit, he got 99% of it right and together with no help from me. He wants to be an engineer and hopefully land a job in the firearms field one day after he's out of the service. He is completely fascinated with the engineering behind the AR, and wants to know more about Eugene Stoner. Any good reads out there about the man that might interest him? A better way to learn, instead of detail stripping, would be to let him build his own. There really is no reason to detail strip for cleaning. Well, that is next up on the project list for us. Should be fun. Going to let him choose all the parts (well with some guidance from me). |
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