Specna Arms SA-PH21 PRIME™ M4 14.5″ AEG – Brushless Black

The Specna Arms SA-PH21 PRIME™ M4 AEG is purpose-built for skirmishers and milsim players who demand reliability without compromise. At just 3.2 kg and 81 mm length, this rifle balances manoeuvrability with stopping power—ideal for CQB-heavy sites and woodland engagements alike.

Key Features

• Brushless motor – precise trigger response and longevity under sustained fire
• V2 gearbox with programmable firing modes (safe, semi, full auto, programmable burst)
• CNC aluminium handguard with 20mm RIS rail system – mount optics, laser pointers, or tactical lights
• 345 fps (0.20g) – legal across UK sites; complies with standard power limits
• 125-round mid-capacity magazine – reduced risk of feeding issues; two included
• Compact 14.5″ outer barrel with flash hider – urban and woodland-ready footprint
• Multi-position sliding stock – adjust length-of-pull for different loadouts and shooter comfort
• Alloy construction throughout – receiver, buffer tube, sights – exceptional durability

Real-World Use Cases

This rifle excels in close-quarters woodland skirmishes, where its short length cuts through dense cover without sacrificing accuracy. Milsim players favour the M4 platform for authenticity and modularity—the SA-PH21 is no exception. Target shooters benefit from the brushless motor’s consistency and the rotary hop-up’s fine-tuning capability. Gift-buyers will appreciate the complete package: ready to run out of the box with battery adaptor, foregrip, and two magazines included.

Technical Specifications

• Velocity (0.20g): 345 fps
• Gearbox: V2
• Motor: Brushless
• Hop-up: Rotary
• Firing Modes: Safe, semi-automatic, full automatic, programmable
• Magazine Capacity: 125 rounds (mid-capacity)
• Magazine Compatibility: AEG mid-capacity
• Battery: 7.4V LiPo (Deans connector, mini-Tamiya adaptor included)
• Outer Barrel: Alloy with flash hider
• Rail System: 20mm RIS / RAS receiver
• Stock: Sliding, multi-position
• Length: 81 mm
• Weight: 3.2 kg
• Construction: CNC aluminium handguard, alloy barrel, receiver, sights, buffer tube; steel sling plate; polymer grip and stock; rubber butt plate
• Colours: Black, Chaos Bronze

Compatibility & Upgrades

The V2 gearbox and 20mm RIS rail system make this platform an upgrader’s dream. Swap the included stubby vertical foregrip for any RIS-compatible accessory—shotgun-style pump fore-grips, gas-tube mounted lights, or precision optics. The rotary hop-up is user-serviceable for quick adjustment between heavier and lighter BBs. Deans connector allows quick battery swaps, and 7.4V LiPo cells are inexpensive and widely available in the UK.

UK Legal & Site Notes

At 345 fps with 0.20g ammunition, the SA-PH21 falls within standard UK two-tone legal requirements and typical site power limits (most accept 350–400 fps). Always confirm individual site regulations before play. The included magazines are mid-capacity (125 rounds), compliant with most UK venues.

Order the Specna Arms SA-PH21 PRIME™ M4 AEG online today and receive everything needed for your first skirmish: two magazines, a stubby foregrip, battery adaptor, and stickers. In stock and ready to ship.