The two halves of a Mk. IX limb iron, come together for their first meeting.

Good weld prep and pre-heating will be needed before Tig welding that seam. The steel is 4130 and, just like before, it will eventually be heat treated to around 40 RC. When they are finished, these irons promise to be 38% lighter than the previous set that weighed 6 1/2 lbs each. As seen in the above photo they tip the scale at 5 lbs. The anticipated lightening cuts should take that down to 4 lbs. How much that might improve velocity is an open question. If it will squeeze out another 50 fps, I promise to do cartwheels all the way down the catapult range.

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