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ACM M150 AEG Spring (SP150)
Take your AEG build to maximum power with the ACM M150 AEG Main Spring (SP150). Engineered for players building high-velocity setups and Designated Marksman Rifles (DMRs), this high-tensile steel upgrade spring delivers reliable compression and consistent velocity output. The precision-wound wire resists compression fatigue, maintaining long-term tension without sagging over time. Both ends are ground flat to ensure smooth rotation on bearing spring guides and inside piston heads. Ideal for techs seeking dependable performance in high-output gearboxes, the M150 spring provides the extra range and punch required for long-range field dominance.
The ACM M150 AEG Main Spring (SP150) is designed specifically for airsoft gunsmiths and players aiming to unlock maximum range and velocity from their electric airsoft rifles. Whether you are building a custom Designated Marksman Rifle (DMR) or upgrading a high-power outdoor AEG, this main spring provides the heavy compression needed for superior energy transfer and long-distance engagement.
Premium Build Quality & Consistent Output
Crafted from high-tensile, heat-treated steel, the SP150 main spring is built to withstand repeated compression cycles without losing its structural tension or suffering from power decay over time. Designed with precision ground ends, the spring sits perfectly flat against both your spring guide and piston head. This ensures smooth axial rotation during compression and release, minimising internal friction and reducing wear on your gearbox internals.
Performance Expectations
When installed in a setup with optimum air seal efficiency, an M150 rating typically delivers between 480 FPS and 520 FPS (measured with 0.20g BBs), depending on your barrel length, hop-up tension, and cylinder volume ratios. This makes it an ideal upgrade choice for specialised single-shot DMR builds or high-joule field requirements across Europe where local site regulations permit higher velocity limits.
Compatibility & Technical Recommendations
The ACM M150 spring is compatible with standard AEG gearboxes, including Version 2, Version 3, Version 6, and Version 7 shells.
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Recommended Internals: Due to the heavy tension of an M150 spring, we strongly recommend pairing it with a high-torque motor, a reinforced steel gearset, a full steel-tooth piston, and a metal spring guide with ball bearings.
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Gearbox Shell: Ensure your gearbox casing is radiused and reinforced to handle the increased impact force of high-power spring releases.
Upgrade your rifle with the ACM M150 spring to achieve the power, consistency, and long-range accuracy required to dominate open field skirmishes.
| SKU | 614233 |
|---|---|
| Brand | Double Bell |
| Weapon Category | Parts |
| Recoil | No |
| Shell Ejecting | No |
| FPS | 500+ |
| Spring Type | AEG |
Our courier partners deliver from Monday to Friday, excluding Bank Holidays. We will attempt to dispatch all packages within 24 hours, although at peak times this may take slightly longer. Orders with products with two-tone service or Defence Check may take longer to dispatch.
Once the order is dispatched you will get an email with the tracking number and which courier partner it’s going to be delivered via. Any missing/incorrect items need to be reported with 48hrs of signed delivery.
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Faulty Product?! Unfortunately that is part of life but be rest assured we are here to help! Contact one of our friendly staff via phone or email. Stating what the problem is, if we can resolve the problem via phone or email great if not then they will advise how to send it back and what details we require.
The gun will be sprayed 51% in a bright/primary color (we do only blue, green and red currently). The process of two toning currently runs at 2 working days depending on Drying Time, which is effected by Ambient Temperature and Weather. and currently no express delivery is available for this even if you select it at checkout.