S&T T21 SAR Flat Top Keymod Carbine EBB DE

[Product Details]

 ・ Material: Resin frame / Metal top, with side rails Aluminum handguard, outer barrel, hider
・ Magazine capacity: M4 300 rounds, spring type

・ Compatible battery: Mini battery (front storage type)

・ Connector shape: Mini

・ Semi/full auto 

・ Variable hop-up

・ Equipped with bolt lock system

・ Flip-up front and rear sights

・ Highly expandable top rail specification