Fusion/Demo muzzle complete, for tubes with ID 26mm, 3D printed.

The muzzle has been designed to be as simple and lightweight as possible. Its compact size does not affect the weapon's maneuverability.

The muzzle features slots for line wrapping on both sides for convenience.

The stopper is integrated into the piece, with the knots of the spearheads stopping on the front shaft. The side plates are removable, and both have line wrap slots. The pulleys are included in the files for 3D printing.

The t is equipped with 2 slots for O-rings to make the tube watertight, while the slot for the stopper is isolated by a cylindrical chamber to prevent flooding.

The muzzle fits tubes with an ID of 26 mm and OD ranging from 28 mm to 31 mm, making it compatible with all commercially available tubes, whether carbon or aluminum.

Near the recess stop for the tube, there are 2 through holes. The upper hole allows for the addition of an extra elastic in ferrule mode, while the lower hole serves as an attachment point for dyneema in demultiplication and demo/fusion mode.

The muzzle can also be used in simple fusion and fusion k2 modes with the integrated stopper.

IMPORTANT NOTE

Print without any added thickness, directly as solid material, to avoid breakage and accidental damage to people or property. Use solid materials such as ASA, PA6-CF, PA6-GF30, PA12-CF, and PEEK.

WARNING:

The project is intended for private use only and may be used for recreational purposes as many times as desired. Commercial reproduction is strictly prohibited; the project is ed and protected by copyright.

Closed-chamber printing is recommended. Use solid materials such as ASA, PA6-CF, PA6-GF30, PA12-CF, and PEEK.

IMPORTANT NOTE

Materials and/or specifications for machining from solid using CNC.

Nylon

• Nylon 6 (PA6): 1.13 g/cm³
  
• Nylon 6 CF (PA6-CF), carbon fiber reinforced: ~1.2-1.3 g/cm³
  
• Nylon 6 GF15 (PA6-GF15), 15% glass fiber reinforced: ~1.21-1.27 g/cm³
  
• Nylon 6 GF30 (PA6-GF30), 30% glass fiber reinforced: ~1.35-1.45 g/cm³
  
• Nylon 12 (PA12): 1.01 g/cm³
  
• Nylon 12-CF (PA12-CF), carbon fiber reinforced: ~1.0-1.1 g/cm³
  
• Nylon 46 (PA46): 1.20 g/cm³
  
• Nylon 66 (PA66): 1.14 g/cm³
  

Among nylons, Nylon 12 (PA12) has a very low moisture absorption (approximately 0.25-0.3%), ensuring greater dimensional stability even in humid or submerged environments compared to other variants like Nylon 6 and Nylon 66. Additionally, the specific weight of Nylon 12 is lower than seawater, at only 1.010 g/cm³, while seawater has a specific weight ranging between 1.020 and 1.030 g/cm³.

Delrin (POM - Polyoxymethylene)

• Delrin 150: 1.41 g/cm³
  
• Delrin 100: 1.41 g/cm³ (stiffer than Delrin 150)
  
• Delrin 527UV: 1.41 g/cm³
  
• Delrin 570: 1.42 g/cm³ (glass fiber reinforced, structurally stronger)
  

Teflon (PTFE)

• Teflon G: 1.50 g/cm³ "variable" (15-25% glass fiber reinforced)
  
• Teflon GF: 1.60 g/cm³ "variable" (20-30% glass fiber and graphite reinforced)
  
• Teflon C: 1.55 g/cm³ "variable" (25-26% carbon reinforced)
  

Other Materials

• ASA (Acrylonitrile Styrene Acrylate): ~1.07 g/cm³
  
• PEEK (Polyether Ether Ketone): ~1.3-1.32 g/cm³
• Polypropylene (PP) Density: 0.89 - 0.91 g/cm³ (one of the lightest polymers)
  

Polypropylene (PP) is an excellent choice when lightness and buoyancy are required. It offers a good balance between strength, low weight, and cost-effectiveness. It is commonly used for lightweight, impact-resistant, and chemically inert components, such as containers, automotive parts, and medical devices.

To improve printing quality, it is recommended to use enclosed chambers and specific adhesion surfaces.

It is very lightweight, with a density range of 0.89 - 0.91 g/cm³. It has moderate elasticity and good tensile strength.

Chemical and Physical Properties

- Water absorption: Almost zero (less than 0.03%)

- Wear resistance: Good, ideal for mechanical parts subjected to stress

Common Issues in 3D Printing

- Bed adhesion: Difficult, often requires a PP bed or specific adhesives

- Warping: High, tends to shrink during cooling

- Flexibility: High, making it challenging to print fine details
Esistono diverse varianti di polipropilene, tra cui quelle caricate a fibre, che sono progettate per migliorare determinate proprietà meccaniche del materiale. I polipropileni caricati a fibre offrono una maggiore rigidità e resistenza meccanica, sia in trazione che in compressione, ma presentano degli svantaggi, tra cui un aumento del peso (+20-25%) e una riduzione dell'elasticità rispetto alla versione standard.

There are different variants of polypropylene, including fiber-reinforced ones, designed to enhance certain mechanical properties of the material. Fiber-reinforced polypropylenes offer increased rigidity and mechanical strength, both in tension and compression, but have some drawbacks, including an increase in weight (+20-25%) and a reduction in elasticity compared to the standard version.

The two main types of fiber-reinforced polypropylene are:

• PP-CF reinforced with carbon fiber: This type of polypropylene is extremely rigid and strong but is very expensive, making it less accessible for some applications.
• PP-GF reinforced with glass fiber: This variant is also very rigid and strong, though more affordable compared to the CF (carbon fiber-reinforced) version.

However, in my opinion, it may be more advantageous to opt for fiber-reinforced nylon when choosing between these two types of fiber-reinforced polypropylene. Reinforced nylon offers a good balance of rigidity, strength, and cost, making it a versatile and more economical choice for many applications.