Hi,
I've been arguing with someone about how many shots you need to fire before the 62cc micro plenum of the FX PANTHERA HUNTER COMPACT bleeds.
He said that a good rifle will bleed in 1 or 2 shots.
I said that according to power settings of reg and hammer wheel it can get empty after 1 or 2 or even 10 shots.
Can anyone set the reg to something around 100-120bar and tell me how many shots it takes to bleed the plenum while tank is removed ?
Please help as I want to return the rifle I have cause I think it's faulty somehow in a valve.
But the seller doesn't want to accept the return as he said I have a better than normal piece.

.

Wondering if anyone makes a barrel for Leshiy Classic that can accept the QD mod for quick attachment.

I am looking to sell my Edgun Leshiy 2 repr 350mm alpha precision .30. The L2 includes an extended behemoth mod with custom 3dprinted baffles created by @dorcula, 350cc 315 bar leshiy 2 specific tank mfd 7/20, bcm gunfighter grip, phase 5 aluminum vfg which was a tight fit and caused wear show in pictures, 1 mostly full diablo exact 44.75, 2 full and 1 less than half diablo hades 44.75, 2 magazines, magnet for mags, fill probe which ill also include extra orings for, monstrom scope mount and bsa sweet 22 scope, box manual and all other items shown. I also replaced the trigger pin pivot ball with this one from ebay https://www.ebay.com/itm/334311093241 which was the cause and subsequent fix of the only real issue I've had with the gun other than an oring. There are a few other minor marks on rails and near the valve block. I attached pictures of the mentioned issues, if you'd like more or anything specific please let me know.

I am not really looking for any trades or to separate it, I kind of just threw in the scope so i didn't have to deal with it. My wife and I are planning to move out of the country in 10 months is the only reason I'm looking to sell it.

Asking $1850 shipped in the lower 48

Hello, about the .22 hunter compact 300mm, what're the tune settings you suggest for max accuracy ?
Can you please share your experience ?
Especially with light pellets 13~16 grain.
So please share the weight, diameter and brand of the projectile and the reg & hammer wheel settings.
Thank you

Hello, it turns out I am not much of an airgun guy and just shoot yard varmints with my old Sheridan. Just pulled these two out of the safe and would like to move at least one of them.

Can you give me a range of value for each one? HW35 and FWB Sport 124.

Thanks in advance.

Hello, does anyone know what the max you can spend at Krale and ship to US before there is customs fees?

How often do you buy a new gun and find it defective in one way or another? I can’t be the only one.. Mine is like every other one has had issues. From $99-$3000 doesn’t matter. Share please. If manufacturers don’t fix this and we keep buying and fixing they’ll just keep building crap at rising prices every year. Be professional with your answers please we don’t want to shut business down rather change business practices for the betterment of our beloved sport.

This thing is extremely accurate. .357/9mm semi-auto. Can use one or both tanks. Brand new from Airgun Tactical. Only shot from the bench to film the promotional video, then put back in the box. Brand new condition. Includes case and 2 magazines. Scope not inlcuded. Full video here. You can PM me here or email me at [email protected] or call or text me at 360-844-0962

$799 + free shipping.

Hi,
About the FX PANTHERA macro power adjuster wheel.
I wonder is this designed to be rotated both ways clockwise /anti-clockwise ?
What's the correct recommend official method to rotate it as I feel like it's stuck at 23 no matter I set it to low numbers

Looking for an airgun that perfectly blends high-quality craftsmanship with pinpoint accuracy? Look no further! I'm selling my Airgun Technologies Manul .22 caliber PCP pistol – and trust me, this beauty is not just a piece of equipment; it's an experience.

**Why You'll Love It:**

- **Top-Notch Build Quality:** Crafted with meticulous attention to detail, the Manul is built to last. Its robust construction and sleek design make it a reliable companion for both seasoned shooters and beginners.
- **Unmatched Accuracy:** Whether you're target shooting or pest control, this pistol delivers tight groups consistently. The precision-engineered barrel ensures every shot hits its mark, making it perfect for those who demand accuracy.
- **Super Fun to Shoot:** The Manul isn't just about performance – it's about enjoyment too. Smooth trigger action, customizable settings, and a satisfying feel make every shooting session a blast.

Whether you're adding to your collection or looking for your first high-quality PCP pistol, the Manul is a choice you won't regret. I'm looking to sell quickly, so don’t miss out on this fantastic deal!

To quiet its bark, and as an added value to the low price, I’m including the attached AGT LDC for free as well (see pictures)…

Payment of $749 $729 get this pistol to you with prepaid USPS Priority Mail for free (or UPS Ground if you prefer) - for this sale, I’d prefer PayPal only with F&F - I believe my feedback merits not letting PayPal take a 4% cut.

I have aggressively priced this over $100 below the lowest price ($150 below actually) that you can find on the web, in stock, because I have my eye on another project.

Why am I selling? Simply put, I have big hands and sausage style fingers, and this airgun doesn’t seem perfectly fit for my dexterity. YMMV.

Finally, I will be unreachable the weekend of the 24th - please be patient - I will respond to all inquiries on Monday evening, the 27th.

Thanks Friends!
Mark

So I have my Taipan Veteran Long that has a great barrel on it. Arguably one of my best shooting guns I've owned. Probably avg .3" groups at 50yds as it is with JTS 18gr at 920fps. I've tried slugs in many guns previously but nothing had really shown promise. Not really even close. I've tried a couple slugs in this gun but no joy. Someone talked about VK XLHP 22gr slugs so thought why not try them kind of as a last chance try. To me surprise they are amazing and have such a great HP for pesting. I only bought a 100 but I've put about 40 on paper. So far I've yet to have a "flyer" and most groups are around .4-.5" at 50yds. Haven't had a group over .5" except a 10 shot group alittle closer to .6". I tried 2 different days and both days results were similar. Really I get about 4 shots around .25" and 1 opens it up. I think it's safe to say my results are very good for a realistic expectation? I think I'm going to buy a few hundred more and use them when days are more windy. Or to get that satisfying POP on pests lol. Maybe fine tune to see if I can get them a hair tighter but don't think I can expect to get much better than my MOA accuracy at 50yds realisticly. Not talking 1 off groups but avg.

I recently purchased a valve removal tool. I'm trying to avoid damaging anything, so I want to be crystal clear on how to use it. Is the screw on the end intended to catch on the edge of the valve seat? There's a video of someone using it, but I'm not entirely sure what they're doing. They're rotating the knurled bit, but I'm not sure to what end.

Thanks.

I'm thinning the herd so I have a Benjamin Marauder 25cal with 2 mags another impulse buy just wanted to shoot it some and I now have so it's also looking for a new home, holds air great now that I replaced the leaking oring between the gauge and air tube. It definitely shoots better than I can shoot it an it punched a ragged hole at 25 yards with JTS 25.39s it's pushing them in the 850 to 870s. Asking $285 shipped and insured...Thanks Terry

Great price on a used Western Rattler. It appears to be a very early model. Be sure to read the description. I'd call to get the most details or to ask questions if I were in the market. I probably won't buy it, so why not pass the deal along to someone whois looking for one? $2000 plus shipping and tax and it's yours.

Mon projet custom Terminator est fini.

Mass flow rate is the amount of a gas that passes through an orifice per unit of time. The three primary parameters that effect the mass flow rate through an orifice are velocity, density, and orifice area. Other factors include gas temperature, orifice entry and orifice exit conditions, both of which are called coefficient of discharge based on the losses around a poppet or turn in the valve... In this thread I'll briefly discuss variables and will happily answer questions if they arise.

Brief mention on how Mass flow rate not only ties into airgun physics but its history.... I used mass flow rate calculations to assist and progress the understanding of balanced valves over at the GTA years ago in the Simplified Balanced Valve thread. My understanding of this calculation helped countless people get reliably tunable balanced valves in their guns for the tuning community, however FX had this figured out, to what degree I cannot say, but they had integrated balanced valves long before the tuning community even knew they had. Since the information went public? Now countless manufacturers are adding these valves to their guns. Coincidence? Maybe..

I also used mass flow rate calculations to help myself and another understand and integrate pilot valves into airguns mechanically while making them incredibly tunable.

The mass flow rate calculations helped paint a picture that shows the nature of whats going on inside both a balanced valve, and a pilot valve in a unit of time the human mind can't quite grasp without math, microseconds.

---

Velocity:

Lets discuss the Velocity of the air parcel (or rather the mean velocity, as there are many molecules, all moving at different speeds).

We'll use a choked flow formula, because the pressure ratio for airguns is incredibly high, and the flow is very much choked.

• γ (gamma): The adiabatic index (ratio of specific heats). For air, γ ≈ 1.4.
• T1: The absolute temperature of the air in Kelvin.
• p1: Pressure of compressed air inside airgun *but to be exact the average pressure during the shot cycle, which depends on start pressure and plenum volume
• p2: Ambient pressure outside determined by your elevation
• R = Gas constant.

For those curious, the formula to determine if the flow is choked is as follows, P1/P2 > (2/(γ + 1))^((γ + 1)/(γ - 1))

Using the above data for my gun, the velocity of air is approximately 769 m/s...or 2522 fps. Changing the pressure does not increase the velocity, as the parameters that determine velocity in choked flow are properties of the gas, or in our case compressed air, and its temperature. Super heating the air or super cooling the air would have great effects, or switching to helium the gas used to propel the projectile.

The above implies my gun can shoot a projectile upwards of 2,000+ fps on compressed air given the right conditions and a light enough projectile. Some may feel the need to challenge this take, and if so, be my guest, as these velocities have already been achieved in airguns by several members of the GTA community.

As noted, the only way to manipulate velocity of the gas itself, is changing the gas to a lighter or heavier one, or changing its temperature, changing the orifice diameter doesn't change the velocity of air either, however it will greatly effect the mass flow rate. Meaning you cannot increase the velocity of air alone with different calibers or porting, only the mass flow rate (volumetric) of air.

---

Density:

Next up is Density, what determines density? We'll use an approximation based on ideal gas behavior, which some may disagree with, however, if you have a better method please share! Ultimately calculating the exact density isn't the purpose of this discussion, rather understanding its makeup.



Using the following:

• Pressure (P): 2000 psi (converted to pascal) = 13,789,520 pa *(This would be the average pressure present during the shot cycle)
• Temperature (T): 295 K (kelvin converted from 72F)
• Specific Gas Constant for Air (R): 287 J/(kg·K)

We'll convert pressure to pascals.

1 psi = 6894.76 Pa
P=2000 psi×6894.76 Pa/psi=13,789,520 Pa

The above formula gives us a density of 162.1 kg/m3

The few ways to manipulate density is to

A) Change pressure (or change plenum volume to change pressure drop during shot cycle)
B) Change composition of gas
C) Change temperature which also has an effect on pressure

This means that as the density increases (more pressure) the mass air flow rate will also increase, assuming the Oririce area and velocity variables are left unchanged, which ultimately means the same airgun at a higher pressure can potentially eject more air mass over the same unit of time compared to the same airgun at a lower pressure, provided you're creating more dwell to reach the plateau at the higher pressure.

---

Orifice area

This is the porting through your airgun. The porting is limited either by design of the gun, or its caliber. You can port larger than the caliber however gains will quickly diminish to the point where you will experience losses. When porting any airgun, one must account for the CSA (cross-sectional area) of any obstructions within the pathway, be it a poppet stem, or the projectile probe.

CSA is calculated as such.

CSA = π⋅(d/2)²

Where d is the diameter, and CSA is cross sectional area.

Lets calculate my valves throat csa, my poppet stem csa, and make sure I have enough flow for my port csa.

Valve throat: 3.1415*(.238/2)² = .04374 sqaure inches
Poppet stem: 3.1415*(.047/2)² = .00174 square inches
Valve exit port: 3.1415*(.225/2)² = .0398 square inches

Now lets subtract the poppet stem csa from the valve throat csa, and we have get .042 in². Most tuners say you want around 5-10% more flow at this location than the rest of the system, likewise with the valve entrance, however I cannot confirm nor deny, but I generally try for a bit over, and in my case, its about 5.5%. What you don't want, is a negative value which would result in not only a slight reduction due to the restricted orifice area, but also because of additional wasted space ahead of the throat which is intended for more flow than one would see with a choke at the valve seat, resulting in undesirable pressure loss.

The other conditions:

Other conditions aren't as impactful yet should be mentioned, such as how many turns, radius of turn, porting surface quality, which often do matter to the most intense of enthusiasts and tuners trying to get every last ounce of performance from their airguns, this is basically Cd, or coefficient of discharge, the efficiency of the flow rate achieved vs calculated in perfect conditions. Temperature can play a large factor however for it to have extreme effects on mass flow rate, you'd have to have extreme shifts in temperature beyond what is reasonable inside the action of an airgun, I'm sure our airguns would eject a more intense mass of air if super heated to a few million celcius opposed to our commonly comfortable range of 0-40c which we shoot at, but even then I am sure seasoned shooters notice the shift in their guns performance from winter to summer, which can partially be chalked up to this key variable that determines the mass flow rate of your airgun.


-Matt

Looking for a nice example of the original Ukrainian stock in the Standard length.

Thank you

I was wondering what the general opinion was on 3d printed parts. The first 3d printed part I got was a chassis for the original AV Avenger, it is the Bonicci Goods design and is a hybrid unit. It has a 3d printed frame and carbon fiber panels on the side. Its been a pretty solid piece and my only complaints with it are with its overall functionality and nothing with its construction.

All Niksan models in stock at DonnyFL.com are now on sale and ready to ship. If you've been on the fence about one of these tough and accurate PCP's, not is the time to grab one before they are gone.

In the past month I had both eyes cataract removal. It is some tremendous shooting now. I was just out. With my old Gamo Whisper .177 with a scope. After readjusting the ocular it was so amazIng. At 35 yds. I could see where the paint chipped off my spinners even with my sunglasses on. Never shot with regular sun glasses on before. I’m 71 and to know I may have good vision for my remaining time is so great. Im glad I got the motivation to get the surgery from some of the posts on AGN. Thanks all, stay well

I'm assuming the majority of members here are retired. Or if I'm wrong what is a good guess on the percentage of retired airguners?
Just guessing by reading a lot of the posts on when people are shooting or out farting around during the day..lol.
Hopefully I'll get there one day and join in on the
fun.

Since taking up shooting springers 6 years ago I have probably fired a quarter million shots. Ive broken guns, mounts and scrambled scopes. Empty pellet tins and rifle shipping boxes litter the floor of the shop.

The thought of knowing how much I had spent almost terrified me. But the actual numbers looked pretty good.

Each shot has cost me about 4 cents.

Half the cost was in the pellet and half was the equipment.

I'm thrifty. And I shoot a lot of Hatsans with Crosman domes. I only own 5 air rifes. My cost per shot over time is probably very low by comparison.

How much does a shot really cost? A nickel? Three for a quarter? Has anyone ever looked at their numbers like that?

I have a Leshiy classic as a compact gun for urban pesting and stuff. I also have an AGT Uragan 2 for more serious hunting. That said, I have firearms, so Uragan may have been an overkill for my needs. I am wondering if I should sell my Classic Leshiy and Uragan 2 and buy Leshiy 2 to replace both.

Anything I need to know about Leshiy 2? I was looking at REPR-X Long with Behemoth thingy attached. But I also see people rocking different regulators and all that. Is that something necessary or? Am I really upgrading by trading them for Leshiy 2?

I run his “moderators” on my Prod because it doesn’t need any of my larger ones for my back yard. It does a great job for sound, is very light and I don’t have to remove it to refill the gun. I bought the new one really just for the hell of it but did hope it would knock down the report just a little bit more. Well it did, I was very surprised at the difference. Now it’s not as quiet as my Sumo’s but for the Prod it is perfect and I’m slinging the CPHPs at 725 fps.