These cylinders are machined from steel and have an excellent finish.
They are great value for money and will last indefinitely if properly maintained.
A Cylinders are ported and should be used for short barrels
B Cylinders are ported and should be used with fairly short barrels
C Cylinders are ported and should be used with medium length barrels
D Cylinders are not ported and should be used with long barrels
E Cylinders are extended for 19 tooth gearboxes
Retro Arms CNC Stainless Steel Cylinder
These cylinders are compatible with most gearboxes.
They should be internally lubricated with medium viscosity liquid silicone oil (we recommend Superlube brand).
They work best when paired with our Viton piston head o-rings.