Specna Arms - SA-F01 Flex M4 URX Rail (Tan) MH SMG Based on the HK

SMG Based on the HK MP5 PDW with a M4 style stock and a RIS top Rail

Simply squeeze the tabs at the rear of the Stock to remove the rubber butt pad

Immersive Vibes: Enhance your airsoft experience by adding the vibrating ammo belt (sold separately) for an extra layer of realism

The serial number plate also function as a "trigger-lock" as well

The Garand became famous for its 'ping' as its clip was ejected on empty

Specna Arms - SA-F01 Flex M4 URX Rail (Tan) MH SMG Based on the HKA 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 URX Rail and the