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The RM4 CQB main spring fits the KWA RM4 ERG Series and is rated to shoot at 330-350 FPS. With the new RM4A1 quick-change spring system, a spare spring to quickly switch to indoor play is a must have.
| Weight | .03 lbs |
|---|---|
| Dimensions | 6 × .5 × .5 in |
In stock
$35.00
In stock
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