Russian Zenit Railed Dust Cover B33 for AK47 (AKM) and AK74 in my opinion is one of the best dust cover mounts I have seen so far. Zenit B33 is battle proven piece of the equipment, currently in use by many Russian Spetsnaz (SF) units. Cover is designed with durability in heart. It is made exceptionally well and machining on it was done very well. Here is our installation video, so many of your questions about how this system works, could be answered by it. I hope to have full review of Zenit rails and this railed dust cover done soon too.
– Rob Ski