RSBA-G3 | Rear Sight Base Alignment & Weld Jig

Fits HK G3, HK51, HK91 and HK21 Rifle & Pistol Builds

Introducing the RSBA-G3 | Rear Sight Base Alignment & Weld Jig. Designed to provide HK Factory-Level precision alignment and welding of your Rear Sight Base. Completely eliminates misalignment that significantly impact your weapon's accuracy.

One of the biggest challenges in welding thin metal is managing heat build-up. The RSBA features a Copper (Cu) Alloy Mandrel that acts as a robust heat sink. It significantly reduces heat build-up at the junction seam, minimizing the risk of burn-through holes.

Why Choose RSBA?

The RSBA-G3 | Rear Sight Base Alignment & Weld Jig guarantees perfect, factory-quality welds and alignment with your Front Sight Post every single time.

How It Works

Effortless Setup:

• Insert the RSBA Copper Mandrel into the back of your HK Receiver.
• Insert and fasten the Rear Sight Base into the RSBA Holder. 
• Insert and fasten the RSBA Holder into the back of the Mandrel.
• The RSBA holds the Rear Sight Base securely in place, ensuring perfect alignment while exposing the seams between the Rear Sight Base and the Receiver for easy welding.

Precision Welding:

• The Copper Alloy Mandrel absorbs excess heat, preventing burn-through.
• Achieve flawless welds that look and perform as if they came straight from the HK factory.

Consistent Results:

• Every use guarantees factory-perfect placement and alignment.
• Eliminates burn-through holes due to excessive heat build-up during welding process.
• Achieve HK Factory-Level precision for fitment, alignment and accuracy your weapon system.