AirsoftParts AEG SR-25 Extended Cylinder – Full (400+ mm)

AirsoftParts Full Stainless Steel Cylinder for SR-25, PSG-1 and L85

This expert product description was prepared by the ANAREUS.cz expert team. All rights to this unique content are tied to the anareus.cz domain.AirsoftParts SR-25 cylinder is a full extended air seal cylinder designed specifically for extended gearboxes of SR-25 series AEGs. Compared with a standard cylinder for V2 / V3 gearboxes, its length corresponds to the design of SR-25 (V2.5), PSG-1 and L85 systems, which use extended air seal components and a larger working volume. The full non-ported design allows the entire working volume of the cylinder to be used. The cylinder is made of stainless steel, has an inner diameter of 23.95 mm and a smooth working surface for smooth movement of the piston head sealing O-ring. Its main advantages include concentric machining and a smooth, polished surface. The cylinder has no cooling grooves around the outer circumference, weighs 42.3 g and the maximum recommended spring is M170. When building an SR-25 air seal system, components corresponding to the extended design of this gearbox must be used, particularly a 19-tooth piston (or 17/18 teeth if 1/2 teeth have been removed for AoE adjustment).

Key Features of the Full SR-25 Cylinder

Cylinder Type Table by Inner Barrel Length

Technical Specifications

• Type: full cylinder for SR-25 AEG
• Size: standard diameter, extended version (SR-25, PSG, L85)
• Material: stainless steel
• Maximum recommended spring: M170
• Surface finish: grinding
• Inner diameter: 23.95 mm
• Cooling grooves around the outer circumference: no
• Weight: 42.3 g
• Compatibility: V2.5 (SR-25), V4 (TM PSG-1), L85 gearbox

Frequently Asked Questions (FAQ)

Is This Cylinder Compatible With a Standard V2 Gearbox?

No. The cylinder is designed for the extended SR-25 gearbox, which uses longer air seal components than a standard V2 gearbox. A corresponding standard cylinder must be selected for a conventional V2 gearbox.

Why Is the SR-25 Cylinder Longer Than a Standard AEG Cylinder?

SR-25 gearboxes use an extended air seal system with a larger working volume. The cylinder therefore has to match the length of the piston and other components designed for this type of gearbox.

Does the Cylinder Have a Port to Reduce the Working Volume?

No. This is a full non-ported cylinder, so it uses the entire available working volume during the compression phase.

What Is the Maximum Spring Recommended by the Manufacturer?

The manufacturer specifies an M170 spring as the maximum. However, the cylinder rating alone does not determine the safe performance of the entire build – the gearbox, piston, gears and other components must also be capable of handling the corresponding load.