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Author
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Topic: AR bipod question
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Cdog911
"There are some ideas so absurd only an intellectual could believe them."--George Orwell.
Member # 7
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posted January 15, 2011 05:52 PM
Since this is THE board for posting all inquiries related to AR rifles, and since everyone here will be spinning and spitting at the prospect of using EBR's on coyoteeees, I have a question. I saw a bipod for AR rifles that clamps directly to the barrel rather than attaching via a rail. With the pod folded up, I wouldn't see it messing with the harmonics of the barrel and altering your zero, but with the gun on solid ground, on the pod - clamped to the barrel - wouldn't that totally trash your POI from POA? Just curious...
Your thoughts?
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I am only one. But still, I am one. I cannot do everything, but still, I can do something; and, because I cannot do everything, I will not refuse to do something that I can do.
Posts: 5440 | From: The gun-lovin', gun-friendly wild, wild west | Registered: Jan 2003
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TA17Rem
Hello, I'm the legendary Tim Anderson, Southern Minneesota Know it all
Member # 794
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posted January 15, 2011 07:06 PM
Almost anytime you attach something to a barrel you will have to site it back in and same if you remove it...
AR's have a gas block attached to the barrel and dose'nt seem to bother accuracy, and same can be said for screw on muzzle brakes or suppressures.....
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What if I told you, the left wing and right wing both belong to same bird!
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TOM64
Knows what it's all about
Member # 561
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posted January 15, 2011 07:18 PM
Yes the el cheapo GI bipod would destroy accuracy. I guess it's for the spray and pray boys that can't hold their guns up long enough for a mag dump.
Posts: 2283 | From: okieland | Registered: Feb 2005
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Q-Wagoner
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Member # 33
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posted January 19, 2011 03:06 PM
I personaly would never clamp any bipod to a barrel. It will will make the point of impact unpredictable. Other than the overall quallity of the barrel, consistant/repeatable barrel harmonics will play criticle role in a rifles accurcy. Top barrel makers go to great lengths to stress relieve ther barrels. A stress free barrel will will be more predictable than a stressed barrel. Anything that interrupts the harmonics of the barrel will affect your point of aim. At close range it wouldn't be that big of a deal but would be evident at longer ranges.
Good hunting.
Q,
Posts: 617 | From: Nebraska | Registered: Jan 2003
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Leonard
HMFIC
Member # 2
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posted January 19, 2011 03:15 PM
That's a good point, Quentin. I guess? Personally, I would never think of attaching a bipod to a barrel, harmonics being what they are, nor would I do any shooting with the barrel rested on anything, for the same reason. Maybe, with machineguns, it don't matter much?
Good hunting. LB
edit: and yes, Lance. This is AR CENTRAL. Headquarters for all machinegun questions.
PS what does EBR mean?
[ January 19, 2011, 03:18 PM: Message edited by: Leonard ]
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EL BEE Knows It All and Done It All.
Don't piss me off!
Posts: 32361 | From: Upland, CA | Registered: Jan 2003
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Q-Wagoner
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Member # 33
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posted January 19, 2011 03:47 PM
I am accuracy minded and there is no doubt that I demand more from my coyote rifles than what is really needed. It is no coincidence that competitive rifle shooters like there barrels fat and free floated. The further you get away from that standered the more dificult it will be to achieve a high level of accuracy.
Good hunting.
Q,
Posts: 617 | From: Nebraska | Registered: Jan 2003
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Paul Melching
Radical Operator Forum "You won't get past the front gate"
Member # 885
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posted January 19, 2011 05:14 PM
EBR= EVIL BLACK RIFLE
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Those who value security over liberty soon will have neither !
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Cdog911
"There are some ideas so absurd only an intellectual could believe them."--George Orwell.
Member # 7
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posted January 19, 2011 05:45 PM
Sage advice, thus the question. Local gun plumber told me that you can have anything you want attached to the barrel and it will not affect accuracy, as long as that anything is attached to the barrel and touches nothing else, like the ground. Perfect example is the scope mount on those little Handi-Rifles. Damned straight shooters, even with the optics mounted on there.
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I am only one. But still, I am one. I cannot do everything, but still, I can do something; and, because I cannot do everything, I will not refuse to do something that I can do.
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Leonard
HMFIC
Member # 2
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posted January 19, 2011 06:09 PM
Maybe not?
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EL BEE Knows It All and Done It All.
Don't piss me off!
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TA17Rem
Hello, I'm the legendary Tim Anderson, Southern Minneesota Know it all
Member # 794
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posted January 19, 2011 06:26 PM
You can put most anything on a barrel from muzzle brakes, silencers, suppressures, forearm of a single shot rifle,tape and so on. Yes it will change the harmonics and thats why you have to site it in each time you make changes to the barrel. The shorter the barrel the less its affected.. Look at the Browning Boss system for example, its basicly just a weight on the end of the barrel moved back and fourth to balance out the harmonics for a certain load...
If you do some searching you will find that some of the bench rest shooters use a device called a tuner, it looks like a suppressure but is actually a boss system.. My gunsmith uses one on his comp. rifle and has won matches with it..
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What if I told you, the left wing and right wing both belong to same bird!
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Leonard
HMFIC
Member # 2
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posted January 19, 2011 06:45 PM
If you screw a suppressor or a muzzle brake on a barrel, expect a change in point of impact and possibly, accuracy as well. There is no doubt in my mind that a scope mounted on the barrel is detrimental to accuracy. Just cutting an inch or two off the length can change all those harmonics, sometimes it's no big deal, but when measured in thousandths, it CAN make a difference. A bug landing on the muzzle of a long barrel can cause a deflection. Well, I can't prove that, but like was once said: Give me a long enough lever, and I can move the world. Who said that, I can't remember, other than he was Greek, (I think?) but in theory, he's right.
Good hunting. LB
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EL BEE Knows It All and Done It All.
Don't piss me off!
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TOM64
Knows what it's all about
Member # 561
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posted January 19, 2011 06:54 PM
Well, yes a suppressor can change bullet impact as well as changing flash hiders. Some flash suppressors can help accuracy even.
But for the el-cheapo bi-pod Lance is talking about, it was designed for a gun that with it's ball ammo was required to shoot at least 4MOA groups and they called it good.
Adding something to the barrel won't make much difference as long as it does not induce stress to the barrel. Over tighten an A2 flash hider and watch the groups open up.
Tim, I was sure you'd have one of them accuracy enhancing donut thingies on your barrels...
Posts: 2283 | From: okieland | Registered: Feb 2005
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TA17Rem
Hello, I'm the legendary Tim Anderson, Southern Minneesota Know it all
Member # 794
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posted January 19, 2011 07:09 PM
quote:
Tim, I was sure you'd have one of them accuracy enhancing donut thingies on your barrels...
LOL Tom.. Nope.. Plenty happy with 1/4"- 1/2" groups.. ![[Big Grin]](biggrin.gif)
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What if I told you, the left wing and right wing both belong to same bird!
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TOM64
Knows what it's all about
Member # 561
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posted January 19, 2011 07:19 PM
There's always room for improvement....
Posts: 2283 | From: okieland | Registered: Feb 2005
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Kokopelli
SENIOR DISCOUNT & Dispenser of Sage Advice
Member # 633
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posted January 19, 2011 07:26 PM
El Bee;
That was Archimedes that said the lever / fulcrum quote.
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And lo, the Light of the Trump shown upon the Darkness and the Darkness could not comprehend it.
Posts: 8231 | From: Under a wandering star | Registered: Apr 2005
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Q-Wagoner
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Member # 33
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posted January 19, 2011 07:26 PM
Yes and no. Every thing added or taken off the barrel will affect your point of impact. Bipods will not be a solid attachment like a muzzle break, tuner or metallic sights thuss accurcy will be less predictable. In mho, if your tube has a sling swivle get a set of Harris S-series bipods and be done with it.
Good hunting.
Q,
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