It differs from the typical M4 due to FERFRANS' preference to better control on full-automatic mode. Among the features include a patented Delayed Sear Activation System that reduces its cyclic rate of fire in full-auto to just around 550 to 680 rpm, reducing muzzle climb and improving control-ability.
The SOAR also uses a heavy machine gun barrel for increased reliability in sustained firing, rifled in either 1:7 or 1:9 right-hand twist.[3]
Variants
The SOAR is available in both the standard SOAR or the piston-driven SOAR-P.
SOAR (Standard variants)
Barrel length options for the SOAR are in 10.5", 11.5", 14.5", 16", 18", and 20" lengths.[3]
Known upgrades are known as the 10.5 Mk2, 10.5 Mk2-2 and the 11 Mk2.[5]
Piston variants
SOAR-P
SOAR-P (Piston) is the earlier piston variants of SOAR incorporated a short-stroke piston operating system with fully adjustable gas piston system.[6][7] It's available in 10.5", 11.5", 14.5", 16", and 18" barrels.[7][8]
SOAR IAR
An Indonesian Marine soldier firing SOAR IAR in a Live-Fire Range during exercise CARAT 2024.[9]
SOAR IAR (Infantry Assault Rifle) is the improvement version of piston variant, with 14.5-inch barrel assault rifle, 5.56x45mm cartridge, Short Stroke Piston operating system, and rate reducing system in full-auto mode in order to make full-auto fire controllable. It features M-LOK attachment system as part of the weapon's Mission Adaptable Handguard System (MAHS).[7][10]
SOAR CQB
SOAR CQB (Close Quarter Battle) is 10-inch barrel assault carbine, with 5.56x45mm cartridge, short stroke piston system and rate reducing system, designated for CQB and counterterrorism operations.[7][11]
SOAR SCW
SOAR SCW (Sub Compact Weapon) is a 7.5-inch barrel compact assault rifle using rate reduction system meant as the close gap between the 9x19mm submachine-gun that have low penetration and the 5.56x45mm personal defense weapon that have uncontrollably issue in full-auto fire mode during CQC or CQB operations, without needing to develop new rounds but using the existing 5.56×45mm caliber rounds.[7][12]