Caselman New Bolt Design


After thinking about it for about a month I finally figured out how to get rid of about 5/8 inch dead space in between the bolt and the bullet on the air rifle. This should give it better performance and reliability. Old bolt is on the left new bolt is on the right. It’s not quite finished yet, so I haven’t tested it yet.


15 thoughts on “Caselman New Bolt Design

  1. Do you have any casalmen airguns for sale?Would love one for plinking,just don’t have the plans,equipment,or knowledge to build one.

    • Unfortunately the price I’d have to sell them for is really high. They just take so darn long to make. I had over 200 hours in this one and it’s still not quite to where it would need to be to sell. The plans are available online though, just google it.

  2. Too bad Jeff isn’t making the kits anymore (hint hint) as I’d pay those high price and the kits could look benignly like a dismantled push bike.
    Down here Agenda 21 has made our version of the Sacred second a corpse with all the flagrant liberties and eccentricites now taken by our Central bank proxy sell Political puppetry now attendant. Like Taxes based on the most common element known to man that we must pay for a paradigm they created in the first place. I’m so ashamed, we should of gone down fighting. The entire scenario was a sham from the get go.
    I couldnt get within 500 yards of the Queen when she visited Canberra while hiking cross country to intercept her vector on the highway below black mountain, when out of nowhere an Aussie Federal copper (who are gentleman by the way, odd for coppers in my experience) pulled me up. And they try and tell us an Autistic Jap with a starter pistol can just march on stage and let one off while pointing at Charles, the Heir apparent. Yeh riiiiight. Hang a price tag on Manhattan, they”ve got more chance of selling me that, because I definately wont be spoon fed the Bovine excrement with a Hogwash chaser their now trying to force feed me.
    I’ve knocked up some fiddles etc. but my old man prevented me from doing metalshop because I aced the French exam by cheating my @ss off; I couldn’t speak a syllable and after four years still couldn’t. French hear my elective and rattle off in their parlay and I get a look on my face like a dog at a Physics lecture.
    His largely “Boy named Sue” motives also turned into an epic case of Poetic justice as he was an unforgivable bully. I’d wear a few but my little sister? So when deciding on the biblical motif of “Honour thy Father” I took the nomination of which particular Father they intended with a liberal dose of discretion and only slightly lesser valour.
    Beautiful stuff Mike. I love seeing things done properly and its getting I need a white stick down here 🙂

  3. P.S. Who ever said “The pen is mightier than the sword” came from an enemy entrenchment, bet your life on it (1812 anyone?). So as Presidents must go hat in hand to borrow, at interest mind you, to the Fed cabal, proudly hosted by a well known standard traitor just to Govern. Is there any doubt who owns them? or is behind all this and that we are both in fact still Colonies? who really rules our theatres of fictional propaganda?
    They didnt give us “that” fraternity for the reasons we were told and live by. We keep our word. Given that they themselves were Economically invaded with their Civil war (a term to employ extremely loosely) the murder of Charles I and the consequent “Silent Revolution” during the 1690s via the House of Orange proxies and the blossoming House of Rothschild and their bloody shield stained with the vital fluid of Lincoln, McKinley etc. to this very day.
    I’ll have a cup of Boston tea gentleman if you please, but for the love of God keep the Kettle away from the powder. It is now expediant to ignite it, just not in the same vicinity and with greater VOD.
    Our enemies enemy is our friend, so unless I’m very much mistaken, antipathy is not profitably expended on the Russian myth.The controlled conflict has played out and Putin is no Georgian Jew psychopath. They have done to the Bear with a bang and a Shalom what they did to us with a symbiotic mother’s whisper to credulous and naive siblings. Forgive me, I know what it sounds like. But remember the enemy that conquers without being seen or firing shot and corrupts internallylike aliver fluke is a very dangerous enemy indeed and any that face off openly more than likely a friend you mistake for one.
    The fact they spawned Vasili Arkipov and Stanislav Petrov, we may owe thse people more than we will ever know.
    God bless America.

  4. Hi there. Impressed by your craftsmanship, you could work for me anytime. I’ve been studying the photos you put on TFB, I see you put an extra O ring on the bolt now (the old one) was that an improvement? In the original drawings its stated that the bolt body may need weighting with lead, did you try that? I saw you put extra slots in the striker follower, was that to reduce friction and weight? Anyway, nice job and I’m looking forward for more updates. btw I am not considering this a real Caselman APMG till I see it cut a 2 by 4 from ten yards…

    • Thank you. The second o-ring makes sense, but didn’t show much improvement in practice. As far as the lead is concerned I could see that being needed when running the gun at 3000 psi. I’m running mine at just under 1000psi currently. I lightened the bolt and striker in an attempt to up the cycling speed and reliability while running it at the lower pressure. Unfortunately it is far from reliable while at the lower pressure. Eventually I’ll be switching to a hpa setup so I can up the psi to around 2000. Hopefully then I’ll be able to cut up some 2×4’s haha.

      • Maybe you could put an extra valve (smaller) on there that operates the bolt frontward, making the striker double action, that sure could improve cycling speed. I know that would take a whole lot of designing but I think it is possible.
        Did you test the new bolt yet? The idea is good, I wonder if it still has the same blow back power. I think the hole should be a slot to give it more opening time, don’t know could be very wrong. Your barrel, is that a smooth one?

      • Im shying away from double action because it’s already a gas hog. Plus cool down becomes even more of an issue when running co2. I have tested the new bolt, and it definitely needs to be a slot. I just need to get around to working on it again. And im using a rifled barrel.

  5. Hello. I appreciate your whole job on the caselman’s project. You are probably the only one who really made real. Is there any chance you could post plans of the new receiver? Is it going to work if i make it straight from the plans, without any improvements?

    • There really isn’t a lot to post. The main issue is in the magazine block in the lower receiver. There’s an .125 slot that is incorrectly located in the plans. I believe the slot should be located .0625 off to the left side instead of where it is actually located in the plans. Feel free to email me at if you wish to get into it in depth.

    • I have, I don’t know if the demand is there unfortunately. Most of the parts can be made with hand tools and elbow grease, but if you’re looking to purchase some of the harder to make parts such as the magazine block, bolt head, valve body, etc… I can can come up with a price list for you.

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