STX BARREL ALIGNMENT PIN PROBLEM SOLVED

Forums PCP Airguns STX BARREL ALIGNMENT PIN PROBLEM SOLVED

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    CHUCK
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    Yesterday while tinkering with my new Impact MKII I had a problem aligning my barrel on the alignment pin. The barrel alignment pin that is supposed to engage the groove in the barrel inlet to so the barrel can be aligned correctly, had fallen down its' hole in the rear block so that it was not engaging the barrel inlet groove at all. The pin was too short to go all the way down to the bottom of its hole, and also engage the groove in the barrel inlet at the same time. Either the pin was too short or the hole was drilled too deep. Hope my solution to the problem helps someone else who may encounter it someday.

    Using a mechanics magnet I was able to pull the offending alignment pin up and out of its hole. I could not reinsert the pin because it was not long enough to go all the way down to the bottom of the hole and also engage the groove in the barrel inlet both. So I made a brand new pin out of an old Allen key with my Dremel Tool. I inserted the Allen key all the way down to the bottom of the hole, and then marked it and cut it off to the proper height with my trusty Dremel Tool. The new pin is now seated all the way down to the bottom of the hole, and yet is long enough now to also engage the alignment groove in the barrel inlet squarely. Once I had new pin made to the correct size, I used some Loctite to secure it in the hole permanently.

    The first picture shows the finished project, the second picture shows the pin suspended on the magnet, and the third picture shows the small Allen key passing down into the bottom of the hole where the pin belongs so I could mark it to cut it off. I used a different Allen key to tap the new pin I created down into its hole with Loctite on it. As you can see in the first picture the new pin engages the groove in the barrel inlet squarely and also sits at the correct height. You may also notice that I rounded off the "corners" of the Allen key to make it sort of round using the grinding disk on my Dremel Tool.

    All the best, CHUCK

    • This topic was modified 9 months ago by CHUCK.
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    biohazardman
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    Shame on FX but good for you.  It's always nice to be able to DIY and fix it yourself.  Looks like a good fit so you shouldn't have any more problems from here on out.  Thanks for sharing.

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    CHUCK
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    No not shame on anyone really…the guy that put the gun together may have just grabbed the wrong pin or the CNC machine was a couple thousands off that day. I probably could have just ordered a new pin but I was in a big hurry to go shooting my new baby so I made one instead. What a banger! 128 fpe so far!

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    biohazardman
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    My bet is 128 fpe is going to be ouch for something!

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    edosan
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    Member

    Good Job Chuck, first time I saw that, and now is incorporated in my knowledge database ;) thanks for sharing

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