Prometheus 6.03mm Stainless Steel EG Inner Barrel W - 280mm Brand_Night Evolution Slightly longer than regular M4

Slightly longer than regular M4 magazines

Built-in rechargeable lithium battery and USB charging port

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the Lever/Bolt must be in UP position

Clear field of vision - equipped with an anti-scratch & anti-fogging PLATINUM coating and eye-cups made of Cellfoam

Prometheus 6.03mm Stainless Steel EG Inner Barrel W - 280mm Brand_Night Evolution Slightly longer than regular M4Introducing the Prometheus EG Barrel W; Wide Expanded HOP window model, based on the EG barrel with the renewed Wide Expanded HOP window for a variety of HOP nubs and tensioners. The HOP window adopted in this model is a wide type, making it suitable for setups involving R HOP and other extended hop tuning techniques. Also compatible with other tuning setups, allowing for a broader range of customization options. This is a very high quality tight bore