New Bipod for tube Gun

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fclassguy

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I thought I'd post some pictures of a bipod I made for my tube gun. When shooting, the spikes on the feet of the legs are jammed into the ground and the rope is used to take the recoil so you dont have to.

I have made several versions of these bipods for different rifles, AICS, Anschutz Accessory Rail etc. and all have been great.

There is an indexing lever clamp under the rotating ring to adjust for cant if the ground is not level.

The position is so solid and recoil is so mild that I can watch my bullets fly to the target, even with a 308 Win.
Overal weight is 18 pounds as you see it, so it meets FTR specs.

TubeGunBipod1.jpg



RotatingCollet.jpg



Partsview.jpg
 
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MagnumPeanut said:
The string is a little ghetto, eh?
Click to expand...

I can certainly understand a guy feeling that way, but how else can you create down force under recoil and transfer the recoil from the rifle to the bipod feet?

I am certainly wide open to suggestions.

I can man it up a bit by going with black rope.

In the meanwhile all I can say is dont knock it till ya try it I guess. This rig works like no other bipod can.
 
I have tried it. In fact, I tried the Great Grandpappy of that rig. It didn't have a magazine, or a forend tube that nearly reached the target. Nothing at all wrong with stretching the envelope. Enjoy!
 
sounds like the cat's a$$ if it does tame the recoil as you say. Come on out to the Fullbore Championships at Connaught in a couple of weeks and show us how it works.
 
I will not be in competition with the tube gun until next year. It needs a new barrel for FTR competition.

but I will be at Mons range Aug 6,7,8 for the ORA match with a F-Open Remington 700 on an AI stock fitted with a similar type bipod.

This one has a new barrel and shoots about 1/3 of a minute with DTAC 115s and 6XC brass (for the large primers)

Here's a pic


AICSonBipod1.jpg
 
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sillymike said:
What are all the bolts on top of the handguard for?
Click to expand...

The handguard is extended to 24" to move the bipod as far forward as possible to increase the aiming sensitivity at the back end. The shoulder bolts accross the top of the handguard provide multiple points to hook the rope. There are a number of reasons for this...

1) Since the handgaurd is so long, I have concerns about handgaurd vibration and deflection, so the rope is used partialy as a dampener to eliminate that condition.

2) The various bolts points accross the top allow the user to quickly choose which one is ideal and gives the best tracking feel.

3) The rope length can be adjusted to idealize the amount of stretch under recoil that is preffered. When the rope is very short and hooked in the forward most bolt, stretch is very soft because of leverage and recoil is stopped gently. When the rope is long and hooked more to the rear, stretch is minimal and recoil is stopped more abruptly.

4) Regardless of rope length, the rope can be hooked forward or rearward on top to idealize the angle of the front legs. When the feet are forward of the leg pivot point, the rifle will drop during recoil. When the feet are behind the leg pivot points, the rifle will rise on recoil. The shooter can play with that to find the position where the rifle tracks back under recoil in a nice straight line. When its set right you can easily watch your bullets fly to the target.

Both legs are also individually height adjustable mainly to coordinate with the rear bag height to target alignment. But... longer legs seem to work best because of the leg swing radius. That's why I selected a grip with a palm shelf on it. Because I dont mind the extra height.
 
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hmm. me, I'd use plastic coated braided stainless steel cable. That way it won't stretch under repeated firings.
 
Slavex said:
hmm. me, I'd use plastic coated braided stainless steel cable. That way it won't stretch under repeated firings.
Click to expand...

I tried steel cable but found it too abrupt and twangy.
I tried bungee cords too and they are way too soft.
Stretch over repeated firings has never been a problem.
It's that you need just the right amount of stretch under recoil to get the right feel.
 
how long are the spikes on the bottom of the feet? might want to check, but I think F rules say they can only be 1/2". Can't say I've ever seen it enforced, but when I guy shows up w/ something that cool looking, he generally gets examined closer.
 
The DCRA rules are as follows

F2.21. The F-Open rest(s) or base(s) for each front rest may have up to three “feet”. Each such
“foot” may terminate in a spike, which may be pressed into the ground by up to 50mm
(about 2”) provided this causes no significant permanent harm or indentation to the firing
point.
F2.21.1. The F-Restricted bipod may have up to two “feet”. Each such “foot” may
terminate in a spike, which may be pressed into the ground by up to 50mm (about
2”) provided this causes no significant permanent harm or indentation to the firing
point.

50 millimeters = 1.96850394 inches

The spikes on the bipod are just over 1&7/8" so it is compliant with the rules.
 
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that's the one- just couldn't remember how long they could be. It would be a bummer to travel any distance and get stuck w/ an equipment DQ. It looks like a really neat way to keep eyes on target.
 
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