Specna Arms - SA-F03 Flex M4 sd6 the Tar 21 replaced the

the Tar 21 replaced the legendary M4/M16

or a Thread Adapter to take 14mm CCW Muzzle Devices

This was years ahead of its time

pistol grip

Magazine capacity [pcs]: 20

Specna Arms - SA-F03 Flex M4 sd6 the Tar 21 replaced theSA 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