Dry firing the gun was good fun with good blowback action. However this did not last, after 6 magazines worth of rounds the guns began to double feed badly, i.e. every other shot. It appears, unlike the real gun, that this gun requires lots of maintenance. Reassuringly the Glock is easily stripped, simply drop out the magazine, pull the slide release catch and pull the slide off. Once its off its easy to remove and lube up the internal components.
Constant lubrication is required to keep the gun working reliably.
Conclusion Overall I am completely displeased with my Tanaka Works Glock 17. The problems with it mean that I won't buy another Tanaka gun unless I read that they have done a major quality assurance overhaul. The issues highlighted above justify that, also the faults seen uniform across a lot of the Tanaka range, especially the leaky magazines. Next time I will buy a WA gun since I know that their guns are extremely reliable and are low maintenance in comparison. Do you self a favour buy the KSC Glock if you must have a Glock.