Start Building Your HK MP5 Today!

Developed by Heckler & Koch in the mid-1960s, the HK MP5 is still one of the most iconic submachine gun platforms in the world!

NEW TOOLS & JIGS

MP5 Alignment Mandrel

G3 Alignment Mandrel

G3 Barrel Install & Removal

Cocking Tube Alignment

FEATURED PRODUCT

RIVET-MP5 | Case Deflector & Sling Clip Rivet Tool

Factory-Perfect Rivet Formation.

With the RIVET-MP5, achieving factory-perfect rivet formation is simple and efficient. This tool eliminates the need to attach the case deflector and sling clip prior to the bending process, saving you time and ensuring a secure fit each time.

This tool allows you to achieve that factory-perfect rivet formation every single time, providing a secure fastening of your case deflector and sling clip without any hassle.

NEW RELEASE

BIRT-MP5 | Barrel Install & Removal Tool

Easy Barrel Install & Removal

The BIRT-MP5 | Barrel Install & Removal Tool is designed to safely and efficiently install barrels into new trunnions with precision.

Combined with the Barrel Press Guide Assembly and longer Press Rod, this tool allows you to safely remove old barrels and install new barrels into your existing receiver.

No more wrestling with stubborn barrels – the BIRT-MP5 makes the process smooth and straightforward.

Compatible with HK MP5 | MP5K | MP5 SD | HK53

FEATURED PRODUCT

CU-MNDRL | Receiver Welding Mandrel ( HK51 / HK91 / HKG3 / HK21 )

Beautifully welded receivers, perfectly aligned, and free from shrinkage or burn-through.

The CU-MNDRL offers a full-length solid copper alloy mandrel that brings together every seam flawlessly. This means no more guesswork and no more uneven welds.

One of the biggest challenges in welding is dealing with shrinkage and warping. Our mandrel serves as a reliable heat sink, significantly reducing these issues.

Burn-through can ruin a perfectly good receiver, but not when you use the CU-MNDRL. This mandrel is specifically designed to prevent over-penetration and burn-through, protecting your work and ensuring that your receiver remains intact.

Crafted from high-grade Copper (Cu) Alloy and clear PVD coated, the CU-MNDRL is built to last. The use of premium materials and finishes ensures that this tool withstands the rigors of frequent use, offering long-lasting durability.

NEW RELEASE

WAWJ-SBR | Weapon Alignment & Welding Jig

Perfect Weapon Alignment & Welding

The WAWJ | Weapon Alignment & Welding Jig is designed to offer absolute alignment for your HK receiver, trunnion and barrel during the welding process. By automatically aligning, squaring, and centering the trunnion to the receiver rails, this jig enhances reliability and ensures consistent weapon cycling.

Compatible with HK MP5 | MP5K | MP5 SD | HK53 | HK51

FEATURED PRODUCT

RCVR-BNDR | HK Receiver Flat Bending Jig

Precision Rolled Receivers – Everytime

Introducing the RCVR-BNDR | HK Receiver Flat Bending Jig, the next-generation solution designed to shape your receiver flat with unparalleled accuracy and ease.

The jig’s Internal Mandrel design completely eliminates the frustration of your HK receiver flat bending sideways as well as the tedious task of trying to straighten your rolled receiver. This advanced feature ensures your receiver flat bends smoothly and symmetrically, aligning the seams perfectly every time.

Fits All HK 90 Series Receiver Flats

 

NEW RELEASE

BADJ-SBR | Barrel Alignment & Drill Jig

Accurately Aligns Barrel, Trunnion and Front Sight Tower 

Perfect Drilling: This jig is your ultimate solution for aligning and drilling both the HK Barrel Retaining Pin and Front Sight Tower Retaining Pin with absolute accuracy. No more guesswork, frustrating adjustments or canted front sight posts.

Secure Hold: The jig securely holds and perfectly aligns the Trunnion and Front Sight Tower during the drilling and pinning process, ensuring consistent, reliable results.

Fits HK MP5, HK MP5K, HK MP5SD, HK53 and HK51

FEATURED PRODUCT

CU-MNDRL | Receiver Welding Mandrel ( MP5 / MP5 SD / MP5K )

Beautifully welded receivers, perfectly aligned, and free from shrinkage or burn-through.

The CU-MNDRL offers a full-length solid copper alloy mandrel that brings together every seam flawlessly. This means no more guesswork and no more uneven welds.

One of the biggest challenges in welding is dealing with shrinkage and warping. Our mandrel serves as a reliable heat sink, significantly reducing these issues.

Burn-through can ruin a perfectly good receiver, but not when you use the CU-MNDRL. This mandrel is specifically designed to prevent over-penetration and burn-through, protecting your work and ensuring that your receiver remains intact.

Crafted from high-grade Copper (Cu) Alloy and clear PVD coated, the CU-MNDRL is built to last. The use of premium materials and finishes ensures that this tool withstands the rigors of frequent use, offering long-lasting durability.

NEW RELEASE

RSBA-G3 | Rear Sight Base Alignment ( HK51 / HK91 / HKG3 / HK21 )

Perfectly Aligns Your Rear Sight Base During Welding 

The RSBA ensures that your Rear Sight Base aligns flawlessly with the receiver and front sight tower, maintaining your weapon’s accuracy and reliability.

The RSBA features a Copper (Cu) Alloy Mandrel that acts as a robust heat sink. It significantly reduces heat at the junction seam, minimizing the risk of burn-through holes.

FEATURED PRODUCT

CU-MNDRL | Receiver Welding Mandrel ( HK53 / HK33 / HK93 )

Beautifully welded receivers, perfectly aligned, and free from shrinkage or burn-through.

The CU-MNDRL offers a full-length solid copper alloy mandrel that brings together every seam flawlessly. This means no more guesswork and no more uneven welds.

One of the biggest challenges in welding is dealing with shrinkage and warping. Our mandrel serves as a reliable heat sink, significantly reducing these issues.

Burn-through can ruin a perfectly good receiver, but not when you use the CU-MNDRL. This mandrel is specifically designed to prevent over-penetration and burn-through, protecting your work and ensuring that your receiver remains intact.

Crafted from high-grade Copper (Cu) Alloy and clear PVD coated, the CU-MNDRL is built to last. The use of premium materials and finishes ensures that this tool withstands the rigors of frequent use, offering long-lasting durability.

NEW RELEASE

RSBA-MP5 | Rear Sight Base Alignment ( MP5 / MP5 SD / MP5K / HK53 )

Perfectly Aligns Your Rear Sight Base During Welding 

The RSBA ensures that your Rear Sight Base aligns flawlessly with the receiver and front sight tower, maintaining your weapon’s accuracy and reliability.

The RSBA features a Copper (Cu) Alloy Mandrel that acts as a robust heat sink. It significantly reduces heat at the junction seam, minimizing the risk of burn-through holes.

Rental Program

Tools & Jigs On-Demand!

Introducing the New Weapon Builder Rental Program. Complete your next build with us! Just Rent, Build and Return. Fast and Affordable!

Now Available!

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