How to Pin and Weld a Barrel?

From 1934, the permissible length of a standard rifle barrel has been limited to 16 inches. However, if you firmly link a barrel to a muzzle device by welding or soldering the law enables you to make it shorter.

Because of the inexpensive and readily available fourteen and a half inch barrels, as well as the fact that our basic military service rifle has the same barrel length, the rule poses a dilemma for certain shooters.

Many customers fall into the trap of utilizing one without considering the requirement for a permanently connected muzzle device. As it is needed to get the barrel length up to a requisite sixteen-inch in the sight of the ATF.

What Does It Mean to Pin And Weld a Barrel?

To pin and weld, a barrel is commonly done by piercing a tiny hole within the muzzle. Then, inserting a pin to keep the muzzle from getting loose, and welding the pin in position.

Both in magnum and non-magnum revolvers, a pinned barrel relates to a real stainless pin that runs inside the barrel as well as a notched back piece of the barrel.

It was initially meant to assist attach the barrel of the framework. When you hear someone say "pinned and welded barrel," that's exactly what they're referring to.

Step by Step Guide

Step 1:

Select a muzzle. You should consider both the handrail and the barrel length when selecting a muzzle gadget. Ensure the muzzle guard you choose reaches or surpass the 16-inch standard and erase your barrel if you want to utilize one. Other muzzle gadgets that guide the explosion upward or forward include suppressors.

Step 2:

Drill the hole in the barrel.  You may use several types of equipment but we recommend combining a Rotary tool with a drilling machine. Drill the barrel before installing the muzzle gadget this will involve working with the brake much simpler.

You'll also be able to tell exactly when you've drilled far enough. The pin you pick should not have to fully match, but it must be big enough to hold the pin while remaining tiny enough just to keep it straight.

Step 3:

The weld measurement should be taken for cutting the pin; you could use the tip of a stainless punch or similar tools. Insert the punch into the barrel hole, note the length, and then use your rotary tool to cut it out.

Step 4:

Install the pin in the hole now. So that the brake does not twist whenever the weld conceals the pin, the pin must be tightly set in the barrel threads. Next, make a little depression in the threads, but don't go too far and drill inside.  Push the pin into the little hole you've created until it's secure.

Step 5:

Finally, begin welding the pin. For perfect tethering when welding the pin, you might have to remove part of the color of the muzzle. There is a good chance that a tiny blister will form at the weld spot. You might still sand the bubble away and spray over it to suit your barrel and end up making the weld practically undetectable.

Are Pin and Weld Permanent?

Barrels are then tagged at the far end of the pipe or with a permanently affixed muzzle, extracted, and measured. This fixed muzzle installation can take a barrel and end up making it fit with the federal sixteen-inch minimum barrel length standard when utilized with a correctly sized barrel.

Final Note

So, here you go, procedures of welding a barrel and steps to pin it, are all described here. To pin and weld, a barrel is not that hard of a task to do, that you got to visit a professional mechanic to assist you. On one hand, you’ll be saving a lot of money on the other hand you’ll gain enough welding experience.

Last Updated on 1 year by Richard Boyer

  • June 8, 2022
Richard Boyer

Richard Boyer has been a professional welder for over 27 years of his life, and now he is a trainer and blogger providing critical information to anyone interested in welding. He is helping out both hobbyists, novice and professional welders to learn newer and better techniques. Read more about me

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