Brownells 75th Anniversary - A Shooting Heritage

Synthetic Stock Swivel Stud Repair

In the past few months we’ve had several customers, usually police departments or varmint hunters, call with a request for advice about the front sling swivel stud pulling out through the stock on their rifles. In every case, they have had a fairly heavy bipod attached to a heavy rifle. Whenever I’ve spoken with the customer, the stud was only held in place by a standard stock nut, and the stock was a laid-up fiberglass type. We’ve not had any reports of this problem with aluminum insert stocks with the insert reaching to the stud or injection molded stocks.

The repair process that I’ve come up with involves a bit of machining, inletting and bedding work, but it should save the shooter the price of an expensive replacement stock:

The first step, always, is to make certain the rifle is unloaded and there is no ammo present in the magazine.

Remove the barreled action from the stock and set aside in a safe place. Using Brownells TCE Cleaner/Degreaser on a swab, clean out the barrel channel above where the stud pulled out, as well as the pulled-through hole in the stock. Obtain a 4” long piece of aluminum or brass bar stock, 3/8” to _” square, and clean it well with TCE. Mark the inside of the barrel channel 2 1/8” inches ahead and behind the stud’s hole so that the metal bar can be inletted into the stock.

Using a Dremel Tool or similar hand grinder, with proper eye protection and a good dust mask, cut through the stock’s shell inside the barrel channel so that the metal bar can be fitted into the stock. Clean out any filler foam using chisels or gouges until you can see the inside surface of the bottom of the stock’s shell.

Using masking tape, plug the torn-through hole in the bottom of the stock (from the outside) and mask off the outside of the stock’s forend…you don’t want to get any bedding compound on the exterior!

Mix up about a tablespoon full of Brownells Acraglas® Gel, and color it to match the stock, if desired.

Put about a teaspoon of the 'Gel into the cut area of the stock from the top, making sure that the stud hole is filled. Place the metal bar into the inletted area, and push it down to contact the inside of the stock, with a thin layer of 'Gel between it and the stock’s shell. Fill the cavity with the rest of the Acraglas 'Gel, covering the bar, but leaving the level of the 'Gel below the level of the barrel channel at this time.

After the 'Gel has cured to “handling strength” (about ten to twelve hours), remove the tape from the outside bottom of the stock and clean up any 'Gel that has oozed around the tape to the surface of the stock. Set the stock aside to allow the Acraglas 'Gel to finish curing for several days.

Find and mark the location on the stock for a new Sling Swivel Stud and drill and tap the Acraglas 'Gel plug and the bar for thread size 10-32 to accept the new stud. Temporarily insert the stud into the stock and use a straight edge to make sure the stud’s threaded end doesn’t protrude into the barrel channel. Remove and shorten the stud if it does. Re-fit the stud to the stock, making sure that the swivel hole is properly aligned.

Apply two or three layers of Brownells Bedding Tape to the barrel in the area above the bar, and apply release agent to the tape and barrel. (Now would be a great time to bed and, if desired, pillar bed, the action to the stock!) Mix another tablespoon or so of 'Gel, place it in the partially filled recess, and replace the barreled action in the stock. Tighten the guard screws to their normal torque and clean up any excess 'Gel that oozes out of the stock’s barrel channel. Allow the 'Gel to cure for ten to twelve hours, then remove the barreled action from the stock and clean up any excess 'Gel from areas where you don’t want it. Remove the tape from the barrel and clean any remaining 'Gel or release agent from it.

The rifle can now be reassembled, with the sling swivel/bipod stud stronger than when originally fitted.