Real Steel Background

The Knight's Armament Company (KAC) SR-16E3 MOD2 is a short-stroke piston-driven carbine developed for close-quarters battle applications, derived from the Stoner Rifle platform that KAC has refined over decades of military and law enforcement service. The SR-16 series traces its lineage to Eugene Stoner's AR-15 design, but KAC re-engineered it with a proprietary short-stroke gas piston system to address the reliability concerns associated with direct impingement in sustained-fire and adverse-environment scenarios. The E3 MOD2 variant represents the second-generation evolution of the SR-16, featuring the URX4 free-floating handguard system ? an integrated monolithic rail that combines the upper receiver and handguard into a single rigid structure, eliminating the need for a separate delta ring and barrel nut. The CQB configuration pairs a compact barrel with KAC's signature QDC (Quick Disconnect Coupler) flash hider, designed to accept KAC sound suppressors without tools. The SR-16E3 MOD2 has seen service with US Special Operations Command and allied military units, valued for its piston reliability, modularity, and the ergonomic refinements accumulated across KAC's extensive real-world combat experience.

Product Details

Manufactured by VFC, the SR16E3 GBB (MOD2, CQB) replicates the KAC SR-16E3 in a gas-blowback airsoft package, specifically representing the V1 2021 version. The rifle is built around a metal receiver with engraved "Knight" markings, topped with a full-length Picatinny rail. Up front, the 273mm M-Lok URX4 handguard faithfully reproduces the KAC monolithic rail system, complete with engraved "Knight" and "URX4" markings, a Picatinny top rail, and sling sockets on both sides. The 280mm outer barrel is crowned with a steel 55mm QDC-style three-prong flash hider, and a metal dummy gas block with gas tube completes the piston-driven visual authenticity.

The polymer pistol grip provides a comfortable hold, while the polymer crane stock features a rubber stock pad for secure shoulder contact and rides on a metal five-position stock pipe for adjustable length of pull. The rifle feeds from a metal 30-round magazine. A full suite of metal small parts includes an ambidextrous fire selector, steel ambidextrous bolt catch and magazine release, a metal trigger with trigger guard engraved with "Knight" markings, a metal receiver rear plate with sling sockets on both sides, a metal charging handle, and fully adjustable removable metal front and rear flip-up iron sights.

Internally, the rifle utilizes the older legacy V1 fire control group and bolt carrier system. While the V1 system predates the more refined and efficient V2 and V3 designs, it is renowned for its incredible durability and highly realistic trigger group, featuring a two-stage trigger action bar. The V1 uses steel parts throughout the FCG and is fully compatible with V2 and V3 gas magazines, offering a highly customizable and upgradable platform for enthusiasts who appreciate the visceral, hard-hitting shooting character of the original system.

Key Features

• Metal receiver with engraved "Knight" markings and full-length Picatinny top rail, providing the authentic KAC SR-16E3 foundation for optics and accessory mounting

• 273mm M-Lok URX4 metal handguard faithfully reproducing the KAC monolithic rail system, with engraved "Knight" and "URX4" markings, Picatinny top rail, and sling sockets on both sides for versatile carrying configurations

• 280mm metal outer barrel paired with a steel 55mm QDC-style three-prong flash hider, delivering the distinctive KAC muzzle device profile and QDC suppressor-compatible appearance

• Metal dummy gas block with gas tube that reproduces the external appearance of the short-stroke piston system, enhancing the visual fidelity of the SR-16E3 layout

• Polymer crane stock with rubber stock pad and metal five-position stock pipe, allowing length of pull adjustment across five positions to accommodate different body types and shooting stances

• Metal 30-round magazine providing reliable feeding and realistic weight for sustained blowback cycling

• Metal ambidextrous fire selector enabling rapid mode transitions from either side, suited for both right- and left-handed shooters

• Steel ambidextrous bolt catch and magazine release providing positive tactile engagement from either side of the receiver for efficient weapon manipulation

• Metal trigger with metal trigger guard engraved with "Knight" markings, maintaining the authentic KAC aesthetic while protecting the trigger during movement

• Metal receiver rear plate with sling sockets on both sides, offering versatile single-point or two-point sling attachment points for varied carry preferences

• Metal charging handle delivering smooth, positive charging strokes with a tactile feel that complements the rifle's overall build quality

• Fully adjustable removable metal front and rear flip-up iron sights, providing a reliable backup sighting system that can be fine-tuned for precision and folded away when not in use

• Legacy V1 fire control group and bolt carrier system featuring a two-stage trigger action bar, renowned for its incredible durability and highly realistic trigger feel that closely approximates the real steel experience

• Full compatibility with V2 and V3 gas magazines, ensuring the rifle can take advantage of VFC's latest magazine technology despite using the older V1 internal architecture

• Highly customizable and upgradable V1 platform that rewards enthusiast tuning, offering a visceral shooting character with a loud report, strong recoil impulse, and fast cyclic rate that delivers an authentic real-steel sensation