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    Huben Any issues or problems with Huben gk1 please share your experience

    I seemed to have lucked out in this. My 0.22 GK1 is "true to size". For yours, is the barrel is nominal size, but the magazine is oversized? (Mag holes are too large?) And that means pellets are too loose and move around in the mag and jam? What is the work around for this? Larger head...
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    What did you order / receive airgun related today? Thread

    Beautiful looking gun. Just love the finish on the stock.:love:
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    SC Johnson Paste Wax Discontinued!

    Can you explain this: World’s first non-flammable paste wax designed for FRP and other Composites molding. and this? It says: Danger: Flammable solid. I can't quite follow the logic of Danger: Flammable solid in photo World’s first non-flammable paste wax designed for FRP and other...
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    SC Johnson Paste Wax Discontinued!

    Pure carnauba wax is really hard, and is difficult to scratch with your fingernail, unlike beeswax or paraffin. I have about 3-4 lbs of pure Brazilian carnauba wax, that I got from my grandfather (he's been gone for 30 years now). It needs to be mixed with other waxes and a solvent to be...
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    Huben Can you put a red dot on a Huben GK1

    Can't say it's not annoying to receive the same questions repeatedly. And yes, I agree that we shouldn't be obligated to tell people things that are easily found from a search. But I reiterate, the only dumb question is the one you are afraid to ask. Sometimes the questions are truly...
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    Huben Can you put a red dot on a Huben GK1

    There are no dumb questions. Some might be rephrased better, however. We all were beginners once, and we have to ask questions to learn. Sure, as newbies we should search first, but sometimes as beginners we don't even know the key words to search for. It's not good to chase away beginners...
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    Huben Any issues or problems with Huben gk1 please share your experience

    Haven't found a single source for these. I've had to hunt around. I know McMaster had the probe o-rings (in NBR90). Let me tell you stretching NBR90 o-rings onto the probe is REALLY hard. Most folks would give up and use NBR70. NBR70 will not last as long as they will tend to extrude under...
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    Huben Any issues or problems with Huben gk1 please share your experience

    Blush. Wasn't that much work. The first 6 items were on a little scrap of paper that Kelly included with my GK1. (Spare parts bag contents.) So those were easy. Had to go through the manual for the rest of them. Used a calculator to go from OD measurements to ID. ID = OD - 2*CS...
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    Huben Any issues or problems with Huben gk1 please share your experience

    Something like this? GK1 Item # Desc OD x CS ID x CS # PN 1 NBR90 o-ring 17 x 1.5 14 x 1.5 1 #26 close valve brass housing 2 NBR80 o-ring 4.5 x 1.5 1.5 x 1.5 1 #59 brass insert screw 3 NBR90 o-ring 11.5 x 1.5 8.5 x 1.5 2 #63, #87 breech seal, pressure tube connector 4...
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    Huben Any issues or problems with Huben gk1 please share your experience

    It depends. If I need a bunch of o-rings I'll use the oringstore, or captainoring. Make sure you get a kit, if available, or ensure that you are ordering the correct size! Sometimes I sneak in an item, if I'm ordering from McMaster-Car. Ordering from McMaster means you are getting a bag of...
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    Huben Any issues or problems with Huben gk1 please share your experience

    There's different ways to measure o-rings. Some places use the OD, others the ID. Take the OEM and place it in the center of the 4.5x1. It seems like it will just fit. Can you confirm that? If you have calipers, or a mm scale, can you estimate the ID of the 4.5x1 o-ring? Is it oh, 4.5mm...
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    Huben GK1 - 'Feather' carbon fiber air tube - where do I get more such carbon fiber tubes?

    (y) Just didn't want random readers to think that a plain thin wall CF tube would hold up to HPA. CF is strong, but needs to be purposely made for it, like in a CF bottle. To the best of my knowledge, the CF bottles have a liner, with a CF overlay. I'd be looking for vinyl (or something like...
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    Huben GK1 - 'Feather' carbon fiber air tube - where do I get more such carbon fiber tubes?

    You are looking for a CF wrap, not a tube. The air cylinder is made of titanium, not CF. The titanium tube holds the air, the CF veneer is only decorative. So look for CF wrap material. Sorry, haven't researched CF wraps. I suppose it could be a tube, but that might be even harder to find...
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    Huben GK1 - 'Feather' carbon fiber air tube - where do I get more such carbon fiber tubes?

    The pressure tube is made of titanium with a CF wrap. It's about 33mm OD, according to my caliper. It holds the high pressure air. Simple CF tubing is easy to find, eBay, Amazon, etc. I made a shroud for my GK1 out of CF tubing. It was 25mm in diameter. My tubing was 1.5mm wall, so the ID...
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    Mounting Holosun 507c Reflex Sight on Huben GK1 - Sight In (Issues and Resolution)

    Oh, you are making me blush. ;) Don't be harsh on yourself. We've all messed up on these kinds of things. Like an idiot, I bought one of these cheap Pinty laser sights, the kind with 3 tiny LR41 batteries. I'm looking at it thinking, why the heck did I buy this POS? It's canted to the...
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    Mounting Holosun 507c Reflex Sight on Huben GK1 - Sight In (Issues and Resolution)

    Nevermind, I went to the reddotmate website and looked up the adapter. You must have a gap between the bottom and the receiver. When you tighten the screw it bends the piece in the front upward. So either your receiver is deeper, or your reddotmate bottom piece is not as deep as it should be...
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    Mounting Holosun 507c Reflex Sight on Huben GK1 - Sight In (Issues and Resolution)

    My GK1 rear sight used a flat head screw. I simply reused it. Is the bottom of the hole tapered at 90 degrees, or flat bottomed? If you use the socket head cap screw, is the top of the screw below the top of the hole? It should not protrude above the top surface. The photo seems to show...
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    Mounting Holosun 507c Reflex Sight on Huben GK1 - Sight In (Issues and Resolution)

    My sight base is only attached by a single screw to the receiver, but it seems to be ok, if snug but not tight. We both know it is best to tie a sight base down with two screws. I don't know about you, but I try not to mod things like that, if I don't have to. But I did mod my PP700SA...
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    Mounting Holosun 507c Reflex Sight on Huben GK1 - Sight In (Issues and Resolution)

    From here, I can't determine it definitively. Need to measure the plates, the screw lengths, and the flatness of the receiver. These sight adapters rely on the "flatness" of the receiver. @M0ist0ne 's as well as everyone else's. Mine rests on the receiver along the entire length of the...