Mr. Carbon 2.0 main technical features:

• Exclusive C4 design with a reduced head and a higher volume towards the hand.
• Monocoque 100% carbon fiber.
• Great precision and control.
• Easy handling.
• Minimum maintenance.
• Great solidity and stability over time.
• Exclusive stainless steel muzzle that position the slings parallel to the shaft.
• Stainless steel CNC machined trigger.
• Stainless steel behindhand triggering mechanism,.
• Two adjustable ergonomic handles.
• Can be used with shafts with dia. from 6.0 to 6.75mm.
• Can fit C4 Hercules and C4 Vertical reels.

How to know the exact measure of C4 Primeline slings to be assembled on my speargun? 

To make a circular brand

Measure length L on your speargun
L= from the wishbone notch on the shaft to the sling posponing on the head.

14mm dia Slings : (L cm x 2 ) / 3.4
16 mm dia Slings: (L cm x 2 ) / 3.3

Add the cm needed for the binding.

Example: If L is 80 cm and you need to assemble a 16mm dia sling:
80 cm x2 = 160 cm
160 : 3,3 = 48.48 cm
48,48 + 3 cm ( cm for standard binding ) = 51,48 cm

You will therefore have to cut a 16mm dia sling with a length of 51.48 cm.

To make a single band

Measure length L on your speargun
L= from the wishbone notch on the shaft to the sling positioning on the head.
E14mm dia Slings : (L cm x 2 ) / 3.4
16 mm dia Slings: (L cm x 2 ) / 3.3

Add the cm needed for the binding.

Example: If L is 80 cm and you need to assemble a 16mm dia sling:
80 cm : 3.3 = 24.24 cm
24.24 + 3 cm ( cm for standard binding ) = 27.24 cm

You will therefore have to cut a 16mm dia sling with a length of 27.24 cm.