5KU - KAC URX III 12.5 Inch Rail Handguard for AEG / GBB lightweight they have a thread cover

they have a thread cover instead which you can also remove

The front lower half of the APC has an integrated pouch sized to hold up to three M4 sized magazines

Power Source: HFC134a & HFC22 Gas

Each gun is available with a QD design on both sides of the butt stock to allow the user to use the QD mount on either the left or right side of the gun

- Rear magazine loading allowing longer barrel length (~370mm)

5KU - KAC URX III 12.5 Inch Rail Handguard for AEG / GBB lightweight they have a thread coverSpecification: Material: Metal Alloy Feature: Full Metal Construction Take Scopes, Flashlights & Laser Sights plus RIS Foregrip for any tactical purpose Come With Heat Shield inside the handguard Suitable for M4 M16 Series Airsoft AEG GBB Rifle Length (Rail): 315 mm NOTES: Modification & Self Installation is required, recommended for experienced user, consult expertise if needed .