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Posted: 1/20/2010 2:51:46 PM EDT
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I've got a new build.
Stag 4H upper Stag lower Stag LPK RRA A2 stock Twenty round P-Mag Thirty round P-mag Hornady .223 Rem FMJ ammo The ammunition gets stuck in the chamber and requires a lot of force to remove by charging the handle. It doesn't cause any problems when I hand load the round, just from either of my P-Mags. When I remove the magazine it doesn't change, still a ridiculous amount of force to eject. When the round does come out, it has three scratches on one side. I have lubed it up with CLP and am still having problems. Is this an issue with the magazines or the bolt? I haven't shot the rifle yet but would like to get this figured out before I head to the ranch this weekend. http://i472.photobucket.com/albums/rr87/eatmisc/br.jpg |
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The mags are locking into place, can't push them any further.
It is working if only one round is in the magazine, it will easily eject and keep an open chamber. I don't see any bulges but some rounds do have a very small dent on the casing right below the shoulder. On a few of them, even the bullet is scratched and looks like a file was dragged across them. |
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Quoted:
Are all of the correct parts installed in the ejector? (spring, rubber, and o-ring). Chamber gunked up with anything? Is the ammo reloaded (full length sized) or factory? Ok I can't find an o-ring anywhere on the bolt or it's carrier, do I need to take out the roll pins to make sure? Everything in this picture is ok on my own bolt. There seems to be a spring under the extractor and the ejector since they can both be depressed. http://i472.photobucket.com/albums/rr87/eatmisc/bolt2.jpg The chamber is clean and the ammo is factory .223 REM from Hornady. Quoted:
Sounds like a headspace issue. Either with the ammo or the gun. Get your weapon's headspace checked. Is this the same type of deal working headspace/timing with M2's? We never had to headspace M16's but needed to check the M2's before and after shooting. I see no timing tools for the AR, but a Go/No Go bullets? Kind of expensive and I'm working on a budget so I will try this as a last resort. Thanks for the replies, it's my first AR |
| Sounds to me that your trying to hand cycle some rounds to check things out before you fire it for the first time. If so, keep in mind that you can't cycle your rifle as fast as firing it. You will get scratches from the feed ramps and dents from the bolt. I would lock the bolt back and release it with the bolt release as many times as you want to feel comfortable it functions properly without any loaded mags. I would scrub the chamber again to make sure it is clean. Lube the BCG and the lugs up well and take it to the ranch. My bet is all will work well. I have used steel wool and polished up my scratched rounds and put them aside for shooting later. I've checked some of my reloads to see if they chamber and some have taken some force to get back out by hand, but all have fired and cycled properly. I wouldn't be worried unless I was ripping the rims off. Let know how it goes. |
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The only time that I had this problem it was ammo related.
I got a bad batch that had cases that were too long and the brass was getting stuck in the throat of the chamber. Could have been a bad day, but I noticed that the primers were bulging and stopped shooting before I had a catastrophic failure due to over pressure. When I went to eject the unfired round with the charging handle I almost had to beat it back. |
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