Rifle stock QD stud repair for bipod – rifleshooter.com

Rifle stock QD stud repair for bipod – rifleshooter.com

Bipods have gone mainstream in the shooting sports. While high-end rail mounted bipods like the Ckye-Pod are common on precision rifles, the Harris bipod and its clones, are still found on many guns. These typically mount on the front QD stud of a rifle stock.

I had a police officer bring in his 700 Police sniper rifle for a repair. The front QD stud (sometimes called dome stud) was threaded and came out of the stock. After a series of attempted repairs using epoxy he brought it to me for a more permeant solution.

Before we get to work, please read the following disclaimer:

The contents of Rifleshooter.com are produced for informational purposes only and should be performed by competent gunsmiths only. Rifleshooter.com and its authors do not assume any responsibility, directly or indirectly for the safety of the readers attempting to follow any instructions or perform any of the tasks shown, or the use or misuse of any information contained herein, on this website.

Any modifications made to a firearm should be made by a licensed gunsmith. Failure to do so may void warranties and result in an unsafe firearm and may cause injury or death.

Modifications to a firearm may result in personal injury or death, cause the firearm to not function properly, or malfunction, and cause the firearm to become unsafe.

For this project, I ordered the following from Brownells:

In the image above you can see how the stock came. The hole the QD stud mounted too was stripped out.

You’ll notice on the factory stud, the threads are wood style. These aren’t machine threads made to attach to metal. Instead the wood threads would bite into the fiberglass stock. Past repair attempts used the same hardware. For our repair we’ll switch it.

These are the QD dome studs I ordered to replace it. Note the machine threads on the shank.

These two pieces of hardware are what’s known as “t-nuts”. The center has a tenon that is threaded for a machine screw. The nut on the left has small teeth to grab material, while the one on the right has holes for additional attachment hardware. I ordered the QD dome studs shwon above from Brownells to work with these t-nuts. I plan on installing one on the inside of the stock and threading it into that. This will prevent QD stud from coming loose since the t-nut and stud will be sandwiched on opposite sides of the stock.

As far as repairs go, this one is fairly simple. Tool wise, I only need a cordless drill, a drill bit and a counterbore (above, bottom). The counterbore, sometimes referred to as an aircraft counterbore, has a solid pilot on its nose. This allows the tool to follow an existing hole.

I begin by using a drill bit to make a clearance hole for the thread part of the t-nut and the QD dome stud.

From the inside of the stock, I use the counterbore to cut a recess to accept the t-nut.

I test fit the t-nut to make sure it fits inside the recess.

I mix some Marine-Tex epoxy to hole the t-nut in place.

I thread the new QD dome stud up from the bottom and it tightens down the t-nut which in turn displaces the Marine-Tex. I cleaned this with a rag and alcohol.

I use a small Allen key to turn the QD dome stud until it is in position.

The finished repair! This rifle is ready for decades of service!

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