Home Page Brand S&T Length(mm) 690 Weight (g) 2460 Fire Modes Safe / Semi / Full-Auto Rails 20 mm Picatinny Top Rail / Keymod Handguard Main Materials Polymer Compatible Batteries / Gas N/A Other Info/Specs Gas Blow Back S&T M4 SLIM KEYMOD 9" GBB BK£184.95PriceQuantityAdd to CartBuy Now