Pin and Weld
Double H Gunsmithing pins and welds muzzle devices at our shop in Blanch, North Carolina. The usual goal is to permanently attach a flash hider, brake, or similar device so a shorter barrel and device together meet the overall length rules that apply to your build.
A common example is a 14.5-inch barrel with a pinned and welded muzzle device so the assembly reaches the 16-inch overall barrel length many Title I rifle builds need. We also remove an existing pin and weld and install a different device when you are changing to a new flash hider, brake, or mount-compatible muzzle piece.
What we do
- Pin and weld a muzzle device to a threaded barrel
- Remove an existing pin and weld when you are changing devices
- Drill, pin, and weld so the device is fixed to the barrel
- Time the device with shims of different thicknesses (not a crush washer)
- TIG weld a clean bead that holds the pin without heat discoloration or deformation of the muzzle device
We aim for a neat TIG bead that locks the pin in place without heat discoloration or warping of the device. The photos above are from a recent job: bottom (6 o'clock), TIG bead close-up, and side (3 o'clock).
We aim for a neat TIG bead that locks the pin in place without heat discoloration or warping of the device. The photo above is from a recent job.
We do not pin and weld over a crush washer. Crush washers are a poor fit for a permanent install, and we will not use them when the pinned muzzle device also serves as a suppressor mount. We time the device with a stack of shims in different thicknesses so it indexes correctly and stays solid under the pin and weld.
Related muzzle work lives on our Muzzle Brakes and Suppressor Threading pages. If the barrel still needs threads before a pin and weld, we can estimate that with the same job.
Pricing
- Pin and weld: generally the minimum shop charge of $60
Most pin and weld jobs bill at that minimum shop charge. The estimate can run higher when an existing muzzle device is difficult to remove (for example, a stubborn old pin and weld that takes extra shop time to free). You can bring the muzzle device, or we can order it for you. Maker prices for devices we order are separate from the shop labor estimate. Prices assume payment by cash or check unless we note otherwise. Lead times follow our general repair windows on the home page lead times table unless we give a different estimate for your job.
What to bring
Bring the muzzle device you want pinned and welded, or ask us to order it for you. If you are replacing an existing pinned device, bring the new device or tell us which one to order. Tell us the barrel length and what overall length you need the finished assembly to meet.
If the barrel is under 16 inches and you are pinning and welding a muzzle device so the barrel and device together reach 16 inches, bring just the upper (fully unloaded). Do not bring a complete rifle with a short barrel and detachable stock or lower in that configuration. We will test fire the finished upper on a shop lower when function testing is needed.
Compliance with federal and state law for your configuration remains your responsibility; our role is the pin and weld work itself.
Getting started
Call or text 336-694-5739, or email [email protected]. Tell us the make and model, barrel length, and which muzzle device you want pinned (bring it, or we can order it). We will confirm we can do the job and give you a rough starting estimate.