AEX Custom THE DEFENDER - SR10 KWA Rifle

THE DEFENDER – Custom KWA RM4 SR10 ERG Airsoft Rifle

Built to Withstand. Engineered to Dominate.

Introducing THE DEFENDER, a powerhouse custom airsoft rifle purpose-built for the serious MilSim player or field warrior demanding performance, precision, and tactical edge. Based on the rugged KWA RM4 SR10 ERG 3.0, this beast blends realism, durability, and brutal firepower into one aggressive DMR-style platform.

Platform: KWA RM4 SR10 ERG 3.0

At the heart of THE DEFENDER is KWA’s ERG 3.0 system, delivering recoil-on-fire realism and automatic cutoff with compatible PMAGs. The full-metal SR10 base offers rock-solid internals and elite-level out-of-box performance, while the Electric Recoil Gun (ERG) tech replicates the recoil impulse of real steel for immersive gameplay.

Enhanced Range & Accuracy

Upgraded with a Poseidon GEN2 6.05mm Air Cushion Inner Barrel (363mm), THE DEFENDER achieves impressive accuracy shot after shot. Combined with the Guarder SP140 Spring, expect hardened field performance and elevated FPS, perfect for long-range engagements or designated marksman roles.

Tactical Dominance

Outfitted with a PTS Griffin Armament SR M-LOK Rail (12.5"), this rifle provides ample space for accessories while maintaining a lightweight, low-profile handguard. Paired with a PTS Enhanced Rail Section M-LOK (5 Slot) and PTS EPF2-S Vertical Foregrip, you get modularity and ergonomic control in any scenario.

The included PTS Griffin M4SD FlashComp gives this rifle a fierce muzzle profile while enhancing both realism and functionality with CCW compatibility.

Optic Ready. Vision Locked.

THE DEFENDER comes equipped with a APT2 Micro Dot Sight with Integral High Mount and a Hi-Rise Scope Mount w/ Flip-to-Side Magnifier Mount for variable-range targeting. Whether you’re clearing buildings or covering teammates from distance, your visual clarity stays mission-ready.

Comfort Meets Capacity

A PTS Enhanced Polymer Stock (EPS) rounds out the build with exceptional battery space, ambidextrous sling points, and a comfortable cheek weld—ensuring THE DEFENDER stays balanced and efficient in any field condition.

Key Features Summary

• Base Rifle: KWA RM4 SR10 ERG 3.0 (Cutoff & Recoil Enabled)

• Inner Barrel: Poseidon GEN2 6.05mm 363mm Air Cushion

• Spring: Guarder SP140 for high-FPS field performance

• Rail: PTS Griffin SR M-LOK 12.5”

• Muzzle Device: PTS Griffin M4SD FlashComp (CCW)

• Foregrip: PTS EPF2-S Vertical Grip Black

• Optics: APT2 Red Dot w/ Integral Mount + Flip-to-Side Magnifier Mount

• Stock: PTS Enhanced Polymer Stock (EPS)

THE DEFENDER isn’t just a rifle—it’s your frontline advantage. Ready to deploy. Built to protect. Made to win.

Specifications:

Overall Length: 32 inches (stock collapsed)
Weight: 9 lbs
Outer Barrel Length: 12 inches
Barrel Thread: 14mm CCW
Inner Barrel Diameter: 6.05mm
Muzzle Velocity: 450fps
Fire Modes: Safe/Semi/Full
Color: Black
Gearbox: V2 ERG 3.0, 9mm
Magazine Capacity: 30/120 round
Package Includes: Gun, Magazine, manual, warranty card