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Posted: 7/18/2010 4:59:23 PM EDT
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I was out today and found something I didn't like about one of my Ars. I have a gun that is throwing brass to 2:00 and dropping it in front of the shooting bench. Wicked frustrating when your rolling your own. Should I replace the extractor spring, or add a O ring to get the brass to 3-4:00? I'm not into sending the brass into orbit, just playing with it. Guns a 14.5" Car. No problems with the gun at all. Eats anything I feed it. I just would like to be able to scrounge my casings with out having to wait for the line to clear.
Thanks for any help. 
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There is an old wooden box at the range I shoot at that was left there by reloaders just for catching empties.
I just prop the box on its side where my empties fly and dump them into my bag at the end of shooting. Before that there was a 3' long 2"x12" that I'd prop up next to the ejection port to knock the brass down. |
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Why would you comprimise your guns reliability just to have a convenient brass pile....  I'm not sure how installing a BCM Bolt Upgrade Extractor Kit would "compromise reliability." I'd call call it tuning. I also have cut the barrel down and installed a F marked sight base. We are past leaving the gun stock. 
And I would like a "convenient brass pile" (the point of the thread). If you end up leaving a ton of brass at the range, it hurts your $ per round. 
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put one of those shell catcher nets on it.  Guy at the range had one. But he was cutting 7.62 brass and necking it down to 6.5mm. He said new brass was $80 a 100 for his AR. For his bench gun sure. But no for my M4. The brass catcher nets are too much money and I already have enough stuff hanging off my gun. I do think the delta ring would melt the Velcro strappy on the bag. |
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Quoted: Quoted: Heavier buffer. The buffer is a Spikes ST-T2. Already 4 oz. Which direction does the heavier buffer (usually) move the brass drop point? My thinking may be wrong, but to me a lighter buffer would make the brass eject later than 3 o'clock. This is what was shown to me.  |
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The brass catcher nets are too much money and I already have enough stuff hanging off my gun. I do think the delta ring would melt the Velcro strappy on the bag. 8 bucks is too much? The delta ring doesn't melt my strap, sometimes hot brass melts the fabric enough to stick to it. It sounds like you have already decided the only method you're going to consider is experimenting with changing the pattern, so here you go: http://www.armalite.com/images/Tech%20Notes%5CTech%20Note%2034,%20Adjusting%20the%20Ejection%20Pattern%20of%20the%20AR-10%20%E2%80%A6.pdf |
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the standard CAR buffer is ideal for a midlength gas system, however an H buffer will work just fine too. I have a BCM 16" mid length, BCM BCG and BCM standard carbine buffer and spring and my spent casings eject between 1:00 and 2:00. I've looked at everything recommended in the AR15 Ejection chart and there's nothing wrong in my rifle. I don't mind it too much since I shoot southpaw but I would say that the standard CAR buffer in MY rifle doesn't eject casings "perfect". People need to stop paying attention to that stupid ejection chart. |
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the standard CAR buffer is ideal for a midlength gas system, however an H buffer will work just fine too. I have a BCM 16" mid length, BCM BCG and BCM standard carbine buffer and spring and my spent casings eject between 1:00 and 2:00. I've looked at everything recommended in the AR15 Ejection chart and there's nothing wrong in my rifle. I don't mind it too much since I shoot southpaw but I would say that the standard CAR buffer in MY rifle doesn't eject casings "perfect". People need to stop paying attention to that stupid ejection chart. "But honey! The chart told me told me to buy a auto bcg from BCM!" |
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Buy some extra ejector springs for safe keeping and as spare parts. You'll want them anyway, if you don't already have them.
Remove your ejector and ejector spring and cut just one coil from the spring. Cut it off with a Dremel cut-off wheel, any other method will bugger it up. Place the cut end into the bolt first. Reassemble and shoot for effect. If that doesn't do it, repeat the process. Do not take more than two coils total. One way to set the ejector up for middle of the road ejection patterns is to have the spring length so when the ejector is in the bolt, it's head is dead flush with the forward most part of the bolt and it's not under any spring loading. Simply put, the spring should only be long enough to get the ejector flush with the front of the bolt, no more. Then you can insert it and reassemble. Plan B - Tubb's carrier weight system. Around $50.00. Doing this will not hurt reliablity, in fact it will probably enhance it. If you are worried that it won't be reliable after this modification, simply reinstall a new ejector spring. |
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