SA M4 Keymod (SA-F02 FLEX(TM) Gen.2) – Black

M4 Assault Rifle
The M4 is a compact automatic rifle developed in the United States based on the popular M16 assault rifle. It was designed to meet the need for a lighter and shorter version of the M16, suitable for use in close quarters and urban combat. In the 1960s, the M16—developed by Armalite and adopted by the U.S. Army—became the base design for the M4. In the 1980s, the first M4 prototypes appeared, featuring a shorter barrel and a telescopic stock to improve maneuverability in confined spaces. In the 1990s, the M4 was officially adopted by the U.S. armed forces as the standard-issue carbine, replacing older models like the M3 and M9. The rifle is capable of both semi-automatic and full-auto fire, making it a versatile weapon.Thanks to its low weight, compactness, and reliability, the M4 quickly became popular among soldiers. It saw extensive use in conflicts such as the Iraq and Afghanistan wars and became an iconic weapon of modern U.S. military forces. In addition to the standard model, many M4 variants exist, equipped with various accessories and upgrades to meet the specific needs of military units.The airsoft AEG assault rifle M4 in the base FLEX(TM) series by Specna Arms focuses on lightweight nylon body without sacrificing excellent finish and fit. The fiberglass-reinforced body is more durable than common low-grade metal alloys, making it ideal not only for beginners but also for advanced players who prefer fast-paced gameplay like speedsoft, where every gram counts. This type of body is used in models like the CZ Scorpion Evo or MP7. The FLEX series is essentially the sibling of the CORE line, where the latter features CNC metal handguards, while the FLEX line comes with nylon handguards. The internal Gen2 parts are top-tier, as this model now includes a reinforced QSC gearbox AETHER(TM) V2 (same as in the high-end PRIME series) and a MAGNUS(TM) hop-up chamber with TDC pressure system. The trigger unit is powered by the Gate X-ASR MOSFET.

FLEX(TM) Gen.2 Internal Components
The M4 Keymod (SA-F02 FL..