Jolt handguard optimization

Targeted upgrades enhance the details.

Previously, the handguard did not fully enclose the trigger box; the improved version now features a precisely fitted, fully encompassing design around the trigger box (suitable for Zhu Rong kits).

This enhancement not only strengthens the overall structural stability and harmony but also provides users with a new level of personalization — now, trigger boxes can be customized with your favorite colors, seamlessly blending functionality and self-expression.