TM AKS74U Recoil system, Help needed

[Kev The Grenadier]

Could anyone point me in the direction of a drawing / video / pdf etc of a breakdown or exploded veiw of whats in the TM AKS74U recoil unit?

I have a mate whose AK recoil keeps jamming and I think there is a part missing but cant find any information / tech help with the unit.

Any help would be greatly appreciated.

Cheers

WOOKIE Out!!!