G&G CM16 GMS Striker AEG / HPA Inner Barrels One external compartment

One external compartment

try them all before use to make an universal adjustment)

For this reason

Inner Barrel: ~147mm

G&G CM16 GMS Striker AEG / HPA Inner Barrels One external compartmentFeatures Reinforced polymer billet style receiver Folding polymer M LOK handguard with M Lock slots on the 3, 6, and 9 o'clock positions to mount your light, laser and other accessories Equipped with a MOSFET Integrated Gearbox providing better performance and durability while allowing more modularity True Quick Change Spring system allows you for easy, quick and efficient spring swapping Comes pre installed with a GATE ASTER programmable MOSFET