Description
Double Eagle AEG Spring for M904G/M904N/M907E (1 Joule = 328 FPS)
This is a Double Eagle replacement main spring for the M904G, M904N and M907E AEGs, rated in its name at 1 Joule (328 FPS). The main spring is the part that sets an AEG’s power, so changing it is the usual way to bring a rifle down to a lower limit or to replace a tired spring.
Double Eagle makes affordable rifles with modern features, and genuine Double Eagle springs listed for its own models remove the guesswork when choosing a replacement.
Why a 1 Joule spring
Many sites apply lower power limits in close-quarters areas or for full-auto use, and a 1 Joule spring is a common way to meet them. The name gives the rating as 1 Joule, and the actual result always depends on the rifle, its air seal, the barrel and the BB weight, so always confirm with a chronograph after fitting.
Fitting
Changing the main spring means opening the gearbox on most AEGs. Take photos as you strip it down, keep the shims and small parts in order, and lightly grease the spring guide before reassembly. After fitting, test with no BBs loaded, then have the rifle chronographed. If you are not confident doing this, have it fitted by an experienced technician.
Key features
- Double Eagle replacement AEG main spring
- Rated at 1 Joule in the name
- Listed for M904G, M904N and M907E
- Useful for lower-limit sites and game areas
- Genuine Double Eagle part
Compatibility
Listed for the Double Eagle M904G, M904N and M907E. Other rifles may use different springs or spring guides, so check your model before ordering.
Spare parts are often specific to one manufacturer, and sometimes to one production version, so please compare this part with the one you are replacing, or contact us with your replica’s make and model, before ordering.
Care and maintenance
Leave the rifle uncocked in storage so the spring is not held compressed for long periods, and replace a spring that has noticeably shortened or lost power. Always chronograph after any change to the internals.
Who is it for?
It is for owners of these Double Eagle rifles who need a 1 Joule spring for a lower-limit site, or a replacement for a worn spring.
Please note: Tools are not included. Always chronograph the rifle after fitting.
