Specna Arms SA-F03 Flex M4 AEG Rifle Style:Tan The Hopup Chamber M4P unit

The Hopup Chamber M4P unit is designed to accept the HPA PolarStar Engine M4 nozzle length

It is compatible with most Airsoft AR-15 M4 AEGs including Tokyo Marui

Simply charge this battery with a Titan 3S & 2S LiPo / Lithium ION Balance Charger and you are all set

8 mm ball bearings

Specna Arms SA-F03 Flex M4 AEG Rifle Style:Tan The Hopup Chamber M4P unitSA FLEX SA F03 Carbine Replica Specna Arms proudly presents the FLEX line of replicas. An affordable price combined with an innovative quick spring change system, great performance straight out of the box and high quality components makes this series an excellent choice for both beginners and experienced airsoft players alike. The receiver, the stock tube with the enlarged SF type stock housing the battery, as well as the front in the M LOK standard