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In-House Pin & Weld Service in Killeen, TX

Need a muzzle device pinned and welded to a barrel under 16 inches? We offer ATF-compliant pin and weld service to permanently extend your barrel length to the legal 16" requirement — plus other custom welding services on request.

Pin & Weld, Done Right

A pin and weld is permanent — once it's done, it's done. That's why we measure twice, verify your muzzle device length against the 16" requirement, and finish every weld so it looks clean.

01

Blind pinning with the pin head welded over — one of the permanent attachment methods specified in ATF E-Publication 5320.8.

ATF-Compliant Method

02

We confirm the combined barrel + muzzle device length meets or exceeds 16" before any welding starts. No surprises.

Length Verification

03

Pinning a flash hider, brake, or QD mount that hosts your suppressor? We weld around the mount so it stays fully functional.

Suppressor-Compatible Mounts

04

Standard pricing includes a quick touch-up over the welded area so the work blends with the rest of the barrel.

Touch-Up Refinishing

05

Switching muzzle devices on a previously pinned barrel? We can remove the old weld and re-pin a new device.

Un-Pin & Re-Weld

06

Need it back fast? Expedited service available for both standard pin/weld and un-pin/re-weld jobs.

Expedited Turnaround

Our Process

How a Pin & Weld Job Gets Done

Permanent means permanent. Each step is deliberate, and nothing gets welded until the math is verified.

01

Verification

Confirm barrel length, muzzle device length, and that the combined assembly meets or exceeds 16" per ATF.

02

Install & Time

Install the muzzle device, time it correctly (especially for compensators and brakes), and torque to spec.

03

Pin & Weld

Drill the locating dimple, set the pin, and weld the pin head over per ATF-compliant method.

04

Touch-Up & QC

Touch up the welded area, inspect the joint, and confirm overall length one final time before pickup or return shipping.

PRICING

Pin & Weld Pricing

What Customers Say

"Sent my Glock slide from Florida. Got it back in 10 days looking better than I imagined. The camo pattern was flawless. Will be sending more."

Verified Google Review

"Best Cerakote shop near Fort Cavazos, hands down. Fast turnaround, fair pricing, and the quality is outstanding. Long does right by the military community."

Verified Google Review

4.9 on Google • 100+ Reviews
"Had my AR and two pistols done. Every single one came back perfect. No shortcuts, no excuses. This is the real deal."

Verified Google Review

Nationwide Service

Mail Your Firearm From Anywhere in the Country

Not local? We accept mail-in orders from all 50 states. As a licensed FFL and Class III manufacturer, your firearm is in safe, insured hands from the moment it arrives.
1

Request a Quote

Tell us what you need. Include photos if you can. We respond within 24 hours.

2

Ship to Our FFL

We provide shipping instructions and a pre-paid return label option.

3

We Do the Work

Same quality as walk-in customers. Progress photos throughout.

4

Insured Return Shipping

Your custom firearm ships back fully insured, ready to go.

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FFL Licensed 
Fully Insured
ClassIII Mfg

MAIL-IN SHIPPING INFORMATION


One Service Per Submission

This intake form covers one service request at a time. If you need multiple services (for example, Cerakote and Stippling on the same item, or services on more than one firearm), please complete and submit this form once for each service.

Submitting separately helps us review, quote, and schedule each request accurately. All of your submissions will be linked to your contact information on our end.

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Are you dropping your item(s) off or shipping?
SERVICE REQUEST / INQUIRY

Lead times vary based on service type, complexity, current workload, and material availability. 

Any timeframes discussed or published are estimates only and are not guaranteed until your item has been reviewed and approved. 

By submitting this intake form, you acknowledge that final scheduling and completion timelines are confirmed after inspection and approval, not at intake.

By submitting this intake form, you acknowledge and agree that:

Items are received in working condition unless otherwise noted. Pre-existing defects, wear, or internal issues may not be visible prior to disassembly or refinishing and are not the responsibility of Custom Defense Firearms LLC.

Refinishing, coating, laser marking, or modification may void manufacturer warranties. It is the customer’s responsibility to verify warranty implications prior to service.

Cerakote, KG GunKote, and similar finishes are durable but not indestructible and are subject to normal wear, holster wear, handling, and environmental exposure. Multi-color or layered finishes are cosmetic in nature and are not warrantied.

Polymer, plastic, hybrid materials, optics, electronics, and accessories are processed at the owner’s risk due to heat, tolerances, and material variability.

Tight-tolerance or hand-fitted parts may require post-coating adjustment. Minor fitting, wear, or finish contact in these areas may occur.

Custom Defense Firearms LLC is not responsible for damage caused by shipping, improper installation, misuse, storage conditions, or work performed by third parties after service.

Items left unclaimed for extended periods may be considered abandoned in accordance with shop policy.

By signing below, you authorize Custom Defense Firearms LLC to perform the requested services and agree to release, indemnify, and hold harmless Custom Defense Firearms LLC and its employees from claims or damages arising from the work performed, except in cases of proven gross negligence.

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Contact

Request a Quote

ADDRESS

Custom Defense Firearms LLC

1911 E. Rancier Avenue

Killeen, TX 76541

Contact us

Service

CONTACT

Please use the Contact Us Page

or Text / Email Us

Text: 408-597-4867

E: customdefensefirearms@gmail.com

HOURS of OPERATION

Monday & Sunday - Closed

Tue – Fri: 10:00am – 6:00pm

Sat: 11:00am – 3:00pm

Custom Defense Firearms LLC

- 07/02 - Class III Manufacturer

- www.onlycustomguns.com

- Cerakote Certified Applicator

- Silencer Shop Kiosk Equipped

- Walk-in or Mail-in - Central Texas

Copyright - Custom Defense Firearms LLC - TX | Updated 04/2026

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