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RetroArms CNC M249 QSC spring guide is an upgrade spring guide designed for airsoft AEG M249 machine gun gearboxes (A&K, Classic Army as well as CNC shells from RetroArms, Bullgear and others). It is manufactured by precise CNC machining from EN AW 7075 aluminium alloy and features an axial ball bearing that reduces spring twisting during compression. The surface has a decorative anodized finish.

25+ years of proven equipment and accessories.
RetroArms CNC spring guide serves as an upgrade part for AEG gearboxes of M249 airsoft machine guns from A&K and Classic Army, and is also suitable for RetroArms and Bullgear CNC shells and others. The precisely machined body made of EN AW 7075 aluminium alloy provides a strong construction and accurate dimensions. The integrated axial ball bearing allows the spring to rotate freely during compression and reduces unwanted twisting. The surface of the guide features a decorative anodized finish. The spring guide latch is not included and the original one must be reused.
The guide is designed as a conversion part for M249 airsoft weapon gearboxes from A&K and Classic Army and is also suitable for RetroArms and Bullgear CNC shells and others.
The guide body is made of EN AW 7075 aluminium alloy, providing a strong yet lightweight construction.
The integrated axial bearing reduces spring twisting during compression and release.
The guide is manufactured on a CNC milling centre for precise machining and accurate dimensions.
The decorative anodized finish protects the surface of the aluminium part and provides a uniform appearance.
| Variants | M249 / MK46 / PKM |
| Color | Black |
| Spring guide | Metal |