Double Bell BY-058 - M4A1 AEG Key mod Rail in Black

Double Bell BY-058 - M4A1 AEG Keymod Rail in Black

Key Features
– Full metal construction with polymer pistol grip
– Keymod handguard with Picatinny rail integration
– Steel silencer with 14mm CCW thread
– Quick spring change system for easy FPS tuning
– Durable V2 gearbox with 7mm bearings
– Functional bolt-catch for easy hop-up adjustment
– Folding flip-up iron sights included
– QD sling attachment points
– Rotary-style adjustable hop-up
– 6.03mm precision inner barrel
– 300-round steel high-cap magazine

Modern Looks, Reliable Performance – Take the Field with the BY-058 AEG Rifle

Description.

The Double Bell BY-058 M4A1 AEG in Black is a high-performance airsoft rifle built for serious players who appreciate modern design and rock-solid construction. With a streamlined Keymod/Picatinny handguard setup and upgraded internals, this AEG rifle blends functionality, realism, and upgrade potential—all while offering impressive out-of-the-box reliability.

Made mostly from metal, including the upper and lower receivers, outer barrel, and handguard, the BY-058 exudes a premium feel. Steel is also used in key areas like the muzzle device, bolt catch, screws, and magazine, boosting both durability and realism. The pistol grip is made from high-strength polymer, providing comfortable handling over extended periods of use.

The rifle’s standout feature is its versatile Keymod handguard, giving players the freedom to mount accessories exactly where needed. It also includes a Picatinny top rail for optics and a full set of folding flip-up sights right out of the box. A functional bolt-catch enhances usability by keeping the dust cover open when adjusting the rotary-style hop-up system—a welcome touch for tuning your BB flight path quickly and easily.

Under the hood, the Double Bell BY-058 is powered by a Version 2 gearbox equipped with 7mm bearings for smooth performance and long-term durability. One of its most useful features is the quick-change spring system. This allows you to adjust the rifle’s FPS to suit different fields and playstyles without having to dismantle the gearbox—a great time-saver.

The included 6.03mm inner barrel provides increased accuracy over standard barrels, and paired with the rotary hop-up chamber, you'll enjoy consistent performance shot after shot. The muzzle features a 14mm CCW thread, making it easy to attach the included steel silencer or swap it for a tracer unit or mock suppressor of your choice.

Finished in tactical black and featuring QD sling mounts, this airsoft rifle is ready for customization and combat. The rifle includes a 300-round steel hi-cap magazine for extended play. Battery and charger are not included, allowing you to pair the BY-058 with your preferred LiPo or NiMH setup.

Other Great Features are,

– Adjustable multi-position stock
– 6.03mm tight bore inner barrel
– CNC-machined rail system
– Compatible with most M4-style mags and accessories

In the box:

– Double Bell BY-058 M4A1 AEG Rifle
– 300-round steel high-cap magazine
– User manual

Specifications

– Model: Double Bell BY-058 (M4A1 Keymod)
– Power Type: Electric (AEG)
– Gearbox: V2 with 7mm bearings
– Blowback: No
– Hop-Up: Rotary Adjustable
– Construction: Metal body with polymer grip
– Colour: Black
– Velocity: Approx. 350 FPS (adjustable via quick-change spring)
– Magazine Capacity: 300 rounds
– Barrel: 6.03mm tight bore

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Sku :

BY-058-BK