It is a "Operating System Semi-Automatic, Gas Impingement" "Model TROY Alpha Carbine – 14.5″, TROY Alpha Carbine – 16″ Caliber 5.56x45mm (.223 Rem) NATO Type MIL-SPEC Rifle Operating System Semi-Automatic, Gas Impingement Magazine Capacity 30 Round Magazine Length - Extended 14.5″ Barrel 33.75″ (85.72 cm) 16″ Barrel 35.25″ (89.54 cm) Length - Collapsed 14.5″ Barrel 29.25″ (74.3 cm) 16″ Barrel 30.5″ (77.47 cm) Barrel Length 14.5″ (36.83 cm) // 16″ (40.64 cm) Barrel Weight 6.5 lbs (2.95 kg) Safety SOCC Standard Safety Selector, Manual lever with indicator markings on both sides of receiver Muzzle Device Pinned Medieval Flash Suppressor Rifling 1 turn in 7″ right hand twist Trigger Standard MIL-SPEC trigger group Stock TROY Tomahawk™ Standard Stock Assembly Forend TROY 13″ (33.02 cm) Alpha Rail with Integrated Front M4 Folding Sight Pistol Grip TROY BattleAx Control Grip Rear Sight TROY Standard Rear Folding BattleSight Front Sight M4 Spring Loaded Sight in Alpha Rail Includes Full set of Squid Grips, TROY BattleMag®, Proctor Sling"

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Hi Samir, No, This rifle is a Direct impingement gas operated semi automatic. ---- : SPECS---- 5.56 NATO (accepts .223 Remington) - Direct impingement gas operated semi automatic - 16" barrel - 1:7" twist - 30 rounds capacity - Medieval flash suppressor - Forged upper and lower receivers - M4 feed ramps - Troy 13" Alpha Rail with integrated M4 folding sights - Troy BattleAxe control grip - Troy M7A1 PDW collapsible stock assembly - Overall length 33" to 30.5" - 6.5 lbs - Black. >>>>>>> Details here : https://worldoftroy.com/product/troy-alpha-carbine/

It is a "Operating System Semi-Automatic, Gas Impingement" "Model TROY Alpha Carbine – 14.5″, TROY Alpha Carbine – 16″ Caliber 5.56x45mm (.223 Rem) NATO Type MIL-SPEC Rifle Operating System Semi-Automatic, Gas Impingement Magazine Capacity 30 Round Magazine Length - Extended 14.5″ Barrel 33.75″ (85.72 cm) 16″ Barrel 35.25″ (89.54 cm) Length - Collapsed 14.5″ Barrel 29.25″ (74.3 cm) 16″ Barrel 30.5″ (77.47 cm) Barrel Length 14.5″ (36.83 cm) // 16″ (40.64 cm) Barrel Weight 6.5 lbs (2.95 kg) Safety SOCC Standard Safety Selector, Manual lever with indicator markings on both sides of receiver Muzzle Device Pinned Medieval Flash Suppressor Rifling 1 turn in 7″ right hand twist Trigger Standard MIL-SPEC trigger group Stock TROY Tomahawk™ Standard Stock Assembly Forend TROY 13″ (33.02 cm) Alpha Rail with Integrated Front M4 Folding Sight Pistol Grip TROY BattleAx Control Grip Rear Sight TROY Standard Rear Folding BattleSight Front Sight M4 Spring Loaded Sight in Alpha Rail Includes Full set of Squid Grips, TROY BattleMag®, Proctor Sling"

Troy no. This rifle is a Direct impingement gas operated semi automatic. ---- : (Specifications and Features): - 5.56 NATO (accepts .223 Remington) - Direct impingement gas operated semi automatic - 16" barrel - 1:7" twist - 30 rounds capacity - Medieval flash suppressor - Forged upper and lower receivers - M4 feed ramps - Troy 13" Alpha Rail with integrated M4 folding sights - Troy BattleAxe control grip - Troy M7A1 PDW collapsible stock assembly - Overall length 33" to 30.5" - 6.5 lbs - Black. ****TROY Details here : https://worldoftroy.com/product/troy-alpha-carbine/

It is a gas piston system "Operating System
Semi-Automatic, Gas Impingement" "Model
TROY Alpha Carbine – 14.5″, TROY Alpha Carbine – 16″
Caliber
5.56x45mm (.223 Rem) NATO
Type
MIL-SPEC Rifle
Operating System
Semi-Automatic, Gas Impingement
Magazine Capacity
30 Round Magazine
Length - Extended
14.5″ Barrel 33.75″ (85.72 cm)
16″ Barrel 35.25″ (89.54 cm)
Length - Collapsed
14.5″ Barrel 29.25″ (74.3 cm)
16″ Barrel 30.5″ (77.47 cm)
Barrel Length
14.5″ (36.83 cm) // 16″ (40.64 cm) Barrel
Weight
6.5 lbs (2.95 kg)
Safety
SOCC Standard Safety Selector, Manual lever with indicator markings on both sides of receiver
Muzzle Device
Pinned Medieval Flash Suppressor
Rifling
1 turn in 7″ right hand twist
Trigger
Standard MIL-SPEC trigger group
Stock
TROY Tomahawk™ Standard Stock Assembly
Forend
TROY 13″ (33.02 cm) Alpha Rail with Integrated Front M4 Folding Sight
Pistol Grip
TROY BattleAx Control Grip
Rear Sight
TROY Standard Rear Folding BattleSight
Front Sight
M4 Spring Loaded Sight in Alpha Rail
Includes
Full set of Squid Grips, TROY BattleMag®, Proctor Sling"