AR Sponsor
Posted: 3/16/2010 2:43:20 PM EDT
|
Hi,
I was just wondering about this, I was taking shot brass out of my hunting jacket and noticed that some of the primers had double strikes. one standard hit and a very small dimple hit beside it. Is this normal, if yes whats the chances of a round going off by accident? Does the small dimple happen when the bolt is released and strips it's first round coming to a stop in battery causing a minor firing pin rebound? Any advice would be great as I would like to stop this from happening again. Cheers, Slug |
|
Quoted:
I've shot a few thousand rounds out of a couple different AR's and never had a slam fire. If you are concerned, I hear winchester makes hard primers. So is the firing pin free to travel under inertia when closing the bolt? Any way of putting it into battery without any possibility of an accidental discharge? |
|
Quoted:
Quoted:
I've shot a few thousand rounds out of a couple different AR's and never had a slam fire. If you are concerned, I hear winchester makes hard primers. So is the firing pin free to travel under inertia when closing the bolt? Any way of putting it into battery without any possibility of an accidental discharge? Use good ammo in a rifle in spec and there is no chance of accidental discharge. I've only heard of a few credible instances of slam fires of any knid and almost all were a symptom of a some other kind of failure. |
|
Quoted:
Quoted:
I've shot a few thousand rounds out of a couple different AR's and never had a slam fire. If you are concerned, I hear winchester makes hard primers. So is the firing pin free to travel under inertia when closing the bolt? Any way of putting it into battery without any possibility of an accidental discharge? The AR-15 system uses a free-floated firing pin, yes. However, when you disassemble your rifle, you will note that the firing pin is VERY light and has very little mass. At the level of inertia created by merely closing the bolt, the statistical likelihood of a slam fire is vanishingly small. I don't know the exact number (though I'm sure Colt has it in their engineering data), but I can assure you it is not something you are ever "likely" to see in a lifetime of shooting ARs. Notice how I said "likely" though. Because yes, even though the odds of that happening might be vanishingly small, it CAN happen (just like one lucky guy wins the lottery while millions lose). If it ever did happen, the odds are a defective primer would be the culprit. This is why you ALWAYS keep the weapon pointed in a safe direction when closing the bolt on a live round in ANY weapon with a free floated firing pin (which includes the M1A in addition to the AR-15). Engineers work to reduce the LIKELIHOOD of various "failure modes" to the smallest chance possible given the state of the art in design engineering and materials science. It is generally impossible, however, to eliminate ALL possible failure modes from a given mechanical design, whether it be a firearm, a car, an airplane, etc. We do not live in a perfect world, and we never will. Keep your weapon pointed in a safe direction and keep your finger off the trigger when dropping the bolt. ETA: And enjoy shooting the HELL out of that weapon! 
|
|
omega62,
Thanks for the reply, I am happy to say we don't live in a perfect world it would be boring if we did. Thanks to everybody else for the reassurance about the my post. Yep your right, just enjoy the gun and don't drop the slide unless it's pointing in a safe direction, I can get my head around that. Now when I get it all repaired and back together I'm going to shoot the hell out of it. It's the most accessory friendly rifle I own and I'm going to enjoy pampering it with goodies as time goes by. BTW slightly off subject but do you know any good videos showing the proper lubrication of an AR and what should be used. Ta, Slug |
AR Sponsor