G&G Airsoft M4 Standard

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This standard applies specifically to M4 replicas, utilizing the magazine form to enable smooth sliding into place as per the conventional design. When working with well-balanced replicas such as the Krytac LVOA, a standard of this length is typically sufficient for stability purposes. However, if your replica tends to be front-heavy or has an uneven weight distribution, opting for the longer standard may prove to be a more stable choice for setup and overall performance.