SRE 100 Spring for Tokyo Marui Next Gen – FPS Softair

FPS Softair SRE 100 main spring for Tokyo Marui Next Gen replicas, made in Italy from carbon steel with silicon and chromium and heat-stabilised to keep its performance over time. In the SRE series the number is the commercial model name and shows the spring's place in the range: 95, 100 and 105, from the lightest to the strongest; the 100 is the middle version.

Features and technical specifications

• Manufacturer: FPS Softair
• Model: SRE100+
• Type: main spring for Tokyo Marui Next Gen gearboxes
• Compatibility: 100% Tokyo Marui standard, for all Next Gen replicas (SRE system)
• Material: blued, pre-tempered carbon steel wire with silicon and chromium, to EN 10270-2
• Heat treatment: stabilised in an oven at 400 °C for 30 minutes straight after forming
• Calibration: developed in collaboration with Terni Softair
• Production: 100% Made in Italy
• Other versions available: SRE 95 and SRE 105

Installation

It replaces the original spring inside the Next Gen gearbox with no modifications. FPS Softair recommends pairing it with a bearing spring guide and a bearing piston head, which reduce friction and spring twist during compression and extend its life.

In the field

Heat stabilisation limits the spring settling with use, so the replica keeps the same performance game after game. After installation the actual power output must be checked with a chronograph, as it also depends on the barrel, air seal and installed parts.