My Hatsan Flashpup project gun

Florida_Man · Jul 26, 2021

I wanted a rifle to mess around with as a hobby and to shoot, in addition to my 2240's and 1322. I like to tinker.

The price was right, so I went with a Flashpup 22 from Utah Airguns. I committed to the Hatsan after always wanting a bull-pup and watching about every video on youtube about them first. Brotherinair channel deserves a substantial amount of credit for my purchase.

Mine groups the Hades, AA 16gr, and JSB 18gr best. The tune I use work well for all these pellets, with the hades being the best.

My work so far

-Huma reg install at 150bar

-Carbon fiber shroud

-DonnyFL Sumo

-Hawke Sport Optics Airmax 30 SF Compact 3-12x40 AMX IR Riflescope

-BLK Rings

-Cleaned and lubricated action

-All factory seals replaced and greased

-Removed stain, sanded, stained ebony, matte clear coat

-Lots of shooting and tuning reg and hammer spring. Trying to get 24 shots before going off reg and staying in the pellets happy zone

Upcoming

+ Polish hammer and inside of action (mine has a section that would shred cheese with ease)

+ Try and figure out a way to have larger bolt handle

+ Low tune and pellet

shoot44 · Jul 26, 2021

Here is what I did to add a larger bolt handle on my SFP. Using RTV glued the "shipping protector" that came with my gun. Looks a little gaudy but it is oh so comfortable and is holding up great.

Also added a front scope rail mount and a rear 3/32nd spacer just under the rear of the scope rail. Gives me a 25yd zero without using hardly any of the scopes elevation turret.

Did that bigger bolt handle thing on my Bantam also. Its a boldt on handle.

Rallyshark · Jul 27, 2021

I did a lot with the Flashpups, both synthetic and wood. Florida_Man, once you go after the porting on that gun, you'll be able to get that 24 shots very easily and with a lower reg setting. They can be a very solid little gun with some elbow grease

Shoot44, great move on the extra rail mount!

Florida_Man · Jul 28, 2021

Thanks. Its getting the courage up to do the port.

I really like that extra rail mount Shoot44

heavy-impact · Jul 28, 2021

Thanks. Its getting the courage up to do the port.

Just remember to never make the port wider. Only make it longer and break sharp edges in the direction of airflow. Have fun.

Edit: Your shop looks awesome.

baassman · Jul 29, 2021

Maybe had I saw this post earlier, I probably wouldnt have returned mine. I knew with some work I could make it better but I just couldnt get over the feel of the gritty action of the bolt. So here I am back to the trusty Prod and re-thinking about my decision.

Nice work!

Florida_Man · Jul 29, 2021

Once you have it open it’s a pretty easy platform to work on.

today I cleaned up the air reservoir of moisture. I’m in Florida with a hand pump, so it’s routine maintenance unfortunately. While I had it apart I went ahead and bored everything out to 11/64” to hopefully get a better flow.

Rallyshark · Jul 29, 2021

Are you sure you mean 11/32" ? There's not room to open a Flash up that much, haha. Realistically, the best one can do is about 3/16" on the transfer, give or take a wee bit. Any larger, and you'll have to re-thread the hole.

Florida_Man · Jul 30, 2021

Typo 11/64*

I was called out yesterday at 2am and never was able to get back to bed

Florida_Man · Jul 30, 2021

Lots of tuning to do

Rallyshark · Jul 30, 2021

Typo 11/64*

I was called out yesterday at 2am and never was able to get back to bed

I wouldn't call it a call out, haha. I just wanted to make sure I wasn't missing something. Now, I have some more questions regarding what was opened up. What all did you open up? You'll want to do the barrel and transfer at the 11/64 you mentioned, and you'll want to open up the valve seat to 3/16 and the valve exit to close to that. After drilling out that valve seat to 3/16, you'll want to work on the opening with some rolled up sandpaper to get the opening up to a true 3/16. That material will stretch when drilling, so the resulting hole will be a bit smaller than 3/16. Another tip, rotate the valve 180 degrees exactly to see where that valve exit lines up to the transfer. If your Flash is like many I have done, you find that hole doesn't quite line up, so you'll want to open that exit hole in a way that makes the alignment better. Don't worry too much, if you have to open that valve exit a bit larger than 3/16 to get the alignment better. It'll have no real negative affect.

If you want to take things farther still, you can make a PEEK valve seat for the valve, which can be opened up quite a bit more. For your uses, it really isn't a necessity though. You should be able to get that Flash doing about anything you want it to do. You just gotta get it breathing as well as possible

Florida_Man · Jul 31, 2021

Typo 11/64*

I was called out yesterday at 2am and never was able to get back to bed

Click to expand...

I wouldn't call it a call out, haha. I just wanted to make sure I wasn't missing something. Now, I have some more questions regarding what was opened up. What all did you open up? You'll want to do the barrel and transfer at the 11/64 you mentioned, and you'll want to open up the valve seat to 3/16 and the valve exit to close to that. After drilling out that valve seat to 3/16, you'll want to work on the opening with some rolled up sandpaper to get the opening up to a true 3/16. That material will stretch when drilling, so the resulting hole will be a bit smaller than 3/16. Another tip, rotate the valve 180 degrees exactly to see where that valve exit lines up to the transfer. If your Flash is like many I have done, you find that hole doesn't quite line up, so you'll want to open that exit hole in a way that makes the alignment better. Don't worry too much, if you have to open that valve exit a bit larger than 3/16 to get the alignment better. It'll have no real negative affect.

If you want to take things farther still, you can make a PEEK valve seat for the valve, which can be opened up quite a bit more. For your uses, it really isn't a necessity though. You should be able to get that Flash doing about anything you want it to do. You just gotta get it breathing as well as possible

Thanks for the advice, I will get to work on it.

I wasn't calling your post a call out, I had a work call out that started at 2am. That led right into my normal work day of 7am-4pm. And earlier in the week I was dealing with follow ups of this https://www.sebastiandaily.com/crime/body-of-missing-pregnant-woman-found-in-gifford-29867/

rong1966 · Aug 1, 2021

Are you Flashpup owners using high rings for your scopes? I've been using medium rings and really have to turn my head sideways to see through the scope.

Rallyshark · Aug 1, 2021

I always used high rings myself. Being comfortable shooting is far more important than having a lower scope mount to me

shoot44 · Aug 3, 2021

Rallyshark - "Being comfortable shooting". Perhaps the best advice ever given.

Rallyshark · Aug 3, 2021

Rallyshark - "Being comfortable shooting". Perhaps the best advice ever given.

Yep! Being comfortable while shooting far outweighs having your scope 1/2" closer to the barrel. When the sight picture just falls in place, you'll shoot 100 times better

Florida_Man · Aug 3, 2021

I have high rings, I can’t imagine trying anything lower.

Florida_Man · Aug 11, 2021

Picked up my Flashpup barrel from the gunsmith. I had him put on a 11 degree crown.

Before

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After

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Marc from France · Dec 14, 2023

Florida_Man said:
I wanted a rifle to mess around with as a hobby and to shoot, in addition to my 2240's and 1322. I like to tinker.

The price was right, so I went with a Flashpup 22 from Utah Airguns. I committed to the Hatsan after always wanting a bull-pup and watching about every video on youtube about them first. Brotherinair channel deserves a substantial amount of credit for my purchase.

Mine groups the Hades, AA 16gr, and JSB 18gr best. The tune I use work well for all these pellets, with the hades being the best.

My work so far

-Huma reg install at 150bar

-Carbon fiber shroud

-DonnyFL Sumo

-Hawke Sport Optics Airmax 30 SF Compact 3-12x40 AMX IR Riflescope

-BLK Rings

-Cleaned and lubricated action

-All factory seals replaced and greased

-Removed stain, sanded, stained ebony, matte clear coat

-Lots of shooting and tuning reg and hammer spring. Trying to get 24 shots before going off reg and staying in the pellets happy zone

Upcoming

+ Polish hammer and inside of action (mine has a section that would shred cheese with ease)

+ Try and figure out a way to have larger bolt handle

+ Low tune and pellet

View attachment 167343

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View attachment 167366

Hi

What diameter of your carbon shroud ? Your FlashPup is the normal or QE ?

Thanks

Florida_Man · Dec 14, 2023

Marc from France said:
Hi

What diameter of your carbon shroud ? Your FlashPup is the normal or QE ?

Thanks

This is what I ordered. I wet sanded it to remove the gloss, as a matte option wasn’t available at the time.

Abester ID 14mm x OD 20mm x 500mm Carbon Fiber Tube 3K Glossy Surface Roll Pipe (1 Piece) https://a.co/d/00BlWZT

My Hatsan Flashpup project gun

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