Delta Armory M4 SilentOps 10" Charlie Airsoft Rifle — Black

The Delta Armory M4 SilentOps 10" Charlie is a carbine-format airsoft gun with an M-LOK system, designed for players who want a compact, modular AR15 platform to build their own setup around. Overall length ranges from 732 mm to 815 mm with the stock extended, the inner barrel measures 280 mm, and the weight comes in at 2,080 g: figures that place it firmly in the CQB/mixed-field category — handy without feeling cheap or flimsy.

The motor is paired with a V2 gearbox featuring a QSC (Quick Spring Change) system, allowing the spring to be swapped without fully stripping the mechbox. The 8 mm metal bearings reduce friction throughout the cycle and contribute to more consistent performance over time. The metal spring guide and 14-tooth piston are the most mechanically stressed components: both are sized for sustained use, but the choice of replacement spring is critical. Springs from manufacturers with inflated ratings can generate stresses beyond what the mechbox is designed to handle — quality springs with ratings that reflect real-world performance rather than nominal figures are strongly recommended. Muzzle velocity is 115 m/s, suitable for most fields when using BBs weighing 0.25–0.28 g.

The connector is Mini Tamiya, and the battery compartment sits inside the buffer tube — a tidy solution that keeps the receiver clean, but one that limits battery shape to the buffer itself. The gun has no MOSFET or ETU: when running 11.1 V LiPo batteries, fitting a MOSFET is essential to protect the trigger contacts from accelerated wear. The upper and lower receivers are made from ABS, keeping weight down, though they behave differently from aluminium under lateral mechanical stress. The M-LOK rail accepts compatible accessories directly on the handguard with no adapters required. The muzzle thread is 14 mm negative (CCW), the standard for European AR accessories.

Key features

• V2 gearbox with QSC system: spring replacement without stripping the entire mechbox.
• 8 mm metal bearings: smoother cycle and reduced wear compared to nylon bearings at equivalent rates of fire.
• 115 m/s with 0.25–0.28 g BBs: field-ready for most sites without modifications.
• M-LOK handguard: compatible accessories mount directly, no additional adapters needed.
• Adjustable length from 732 mm to 815 mm: accommodates players of different builds or wearing body armour.
• 14 mm CCW muzzle thread: compatible with the majority of suppressors and flash hiders available for AR platforms.

In the box

• Delta Armory M4 SilentOps 10" Charlie airsoft gun
• 120-round mid-cap magazine