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The Tr18 is a better blue rod shooting gun (in my opinion). It doesn't have the capability to jam, holds 17 rounds (because rods are too close together for an 18th one), so you don't really even need a magazine, and is very sturdy and reliable. Also, it doesn't need any broken parts.
I made just the mag, so I don't know what the gun is like. I expanded the mag to fit blue rods, and put it on my tr8. works like a charm. Keep up the good work!