IMHO, I don't think that all the "o-ring phobia" I read about is justified.

If used in their intended environment, static o-rings will do their job for a very long time - even decades.

O-rings in a dynamic application (that interface with moving/rotating parts will) have a reasonable service life if properly maintained (lubricated) but will eventually need to be replaced. No big deal, it's routine maintenance. Do it yourself if you are so inclined or have a specialist do it.

In some special applications (like in a Weihrauch) the gland (groove) is designed to "crush" the o-ring and it must be replaced every time that interface is opened.

An o-ring can fail prematurely if the gland was not properly designed, the incorrect size/type of o-ring was used or it was damaged during assembly. Installation over sharp edges can scar the o-ring and improper lubrication can damage it. Other than that they just work as intended.

From what I've seen, most o-ring failures can be traced back to user abuse.

Exceeding design pressure limits can deform an o-ring pushing it out of place. Exposing an o-ring to extreme temperatures, harsh chemicals/solvents or abrasive materials can cause catastrophic failure or latent damage that shows up as a slow leak.

Filling a PCP to maximum pressure then leaving it in a car parked in the sun is potentially harmful to the airgun. Inside the car, temperatures can get high enough to make metal too hot to hold comfortably, exceeding the working range of the o-rings. The heat can cause the pressures in the reservoir to increase making life for an o-ring more difficult.

At the opposite end, extremely cold conditions could cause o-rings to become brittle though I don't think this is a big concern.

Within normal operating temperatures, the o-rings are happy to do their thing and expansion/contraction of joints is not a problem.

There's a whole list of factors to be considered when choosing a PCP. For me, the number of o-rings doesn't matter, the designer used what was needed. PCPs, being HPA systems use o-rings, if you don't like o-rings, then a springer might be better choice for you.

Just my 2 cents.

Cheers!

I need a new air compressor bad..I think the CS4 will fit my budget and use for now..Looking at prices and shipping Alliexpress the best at $417.78...I just wanted to make sure its legit before i buy.. Thank you for your time and concern

Hi guys,
Bought this dlx bt version may 2024 from pyramid air.
was working fine just couple of weeks ago and then the temperature dropped and now the dlx wont read shots no matter what i do near far up down shades no shades,
nothing works,
contacted dlx manufacturer,
they say its because the sunlight this time of year stays at certain angle so i may need the lighting kit if i am using the dlx indoor!!!
Which I don't
I only use dlx outdoor,
anyone else facing similar issue when the temp drops outside but still is sunny and the dlx don’t work,
let me know so at least I can feel good about it!!!
the Bluetooth works fine on the chrono.

Just got this notification in my email. Had not yet seen this. Could be a game changer depending on cost.

This is a M3 .30 caliber 600MM in mint as new condition.
The tune I have on it right now is running 44.5 grain hybrids at just shy of 1000 ft./s
there is a superior slug liner installed, saber tactical TRS rail, saber tactical Arca Picatinny rail, slug probe
and a Donny FL Ronin quick detach moderator.
over $2500 invested. $1850 shipped and insured to your location.


*** SCOPE AND BIPOD NOT INCLUDED****


The pellet shop will be doing the shipping of me. Feel free to reach out to them for my identity and overall condition.

*** NO TRADES***

*** serious buyers only***

Hi - does anyone have an exploded view of the avenge x “internals”? As per my other tread my Avenge X shoots completely random. I wont even call it groups anymore… I know how to take the barrel, probe, stock apart, I have done it several times already, but I want to check every o-ring and regrease them to make sure that everything is in order. I just dont know how to get in there without some visual aid. And I would like to know what all the different screws are for before I untighten them. I know where the degas and regadjuster is located Oh - and here is a picture of my groups with the same pellet (I have ordered som JSBs. One of the probe o-rings broke so I changed that one.

These make excellent verical fore grips. Excellent shape. Picatinny mount. 3 available at $85 shipped per unit. paypal f&f.

Alright, Huben owners. I am jealous and I'm sure many others are as well. a 25 cal is def on my wish list. Hopefully i will be able to afford one in a couple years lol. Anyways i wanted to ask, How much do you guys think it costs Huben to manufacture a gk1? Obviously nobody really knows but im interested to see what people think.

This topic will focus on the fx liners. There are 500mm 600mm 700mm 800mm. We all know the longer the barrel the more power you get from it. The real question is, does size matter when it's about accuracy? Accuracy or precision, whatever you want to call it. I am talking about being able to hit your target (aim point) over and over constantly. If your group is all over the place that isn't accuracy. So, the question is will longer barrel be more accurate than a shorter barrel? If power isn't something I want, but accuracy is, should I get a longer barrel or shorter? If I want to hit a dove size bird at 100 yards plus, can a shorter 500mmbarrel do just as good as a 700mm or 800mm?

I'm a multiple hobby kinda guy, and I've tended to cycle through same hobbies over the years. Recently I've re-discovered my love of airguns. About 3 years ago I sold most of my nice German break-barrels to fund my first PCP - FX Maverick compact in .25. Bought it from a dealer that set it up for me, and I was so impressed with the gun I didn't touch it. Well, it hadn't been shot in over a year, until several weeks ago, and now I'm having a blast like it was new again.

I decided I needed to learn how to tune it, so watched a few videos and turned out to be pretty easy. But, I got lots of questions...

Target Velocity - I've seen many people proclaim "pellet XYZ" likes to be shot at 850 - 900 fps... is there some kind of reference I don't know about? How do you know what velocity for which pellet? Or, is this specific to your rifle and pellet choice?

Hammer spring tension vs. regulator pressure - How would do you come up with this "ideal" combination. I found the AEAC tuning video (great video) - so, I followed his regulator pressure suggestions, but not sure how to match that with the correct hammer tension. I assume these things work together and there is some ideal settings for each gun, but how do you "sneak up" on the right settings for each ?

Lastly, it turns out that I've been shooting the Maverick for years, and the second regulator wasn't even being used... is this good/bad idea for wildcat/maverick? The second regulator was set higher than first regulator. It's not anymore after my tune 125/100

thanks for any advice!

I may be moving from groundhog territory to western South Carolina where I'm told there are a fair number of armadillos. Anybody target them and can tell me what type of terrain in which you hunt them? Would love to see some pics too.

Gonna buy one of them, which would you buy and why?

Edit: I ordered the Zelos in .25

Hi Guys,

Up for sale is a well kept FX King that shoots beautifully and looks good doing it.

I am looking for $1600 plus shipping.
This is .22 caliber and I have upgraded the bottle to a 700cc bottle for more shots per fill.
It is a 300 bar bottle so if your so inclined you can get even more shots.

The stock has been sanded and coated with Tongue oil to give a smoother finish.
Updated for picture with 600mm barrel, I realized last night that I had the 700mm shroud on in the pictures below.
This picture is with the 600mm configuration that is up for sale.
As mentioned below the 700mm barrel, shroud and liner is also up for sale. As an addition to this package or seperately.








It includes the King, 2 magazines, a pellet liner, a heavy liner for shooting slugs (currently in the gun) and the factory case.

Also included is the factory FX hard case which it will ship in.

Does not include bottle clamp or the bag rider. They are just for displaying the gun.

Let me know if you have any questioins.

NOTE**
If you are interested in doing a 700mm King just as I was, I will also have up for sale a complete kit to convert it including the Shroud, Liner,
transfer port, liner lock, shroud cap and shroud cap insert. If you want these we can work up a package deal.

I recently purchased the AirMarksman M4 Impact "Copper" Backbone after seeing a couple of videos on YouTube advertising it. The "Nail in the Coffin" which pushed me to purchase it was a recent Utah Airguns "Walk through Wednesday" video where it was displayed mounted on a Copper M4. I paused that video for about an hour and watched it full length probably 4 times to convince myself it was the "Real Deal". I "Pulled the Trigger" and made the purchase. It arrived safe and sound a few days later and I eagerly opened the box. Upon removing it from the tube it ships in, There it was.. and my heart sank instantly. "That's not Copper" I thought to myself so I checked the label to verify the item I ordered. Copper was boldly printed on the tube so I thought "Maybe its the lighting in this room". I grabbed my pristine, brand new M4 Copper and the Backbone and headed to the garage where the lighting is crisp "Daylight" 5000k LED. I set the rail down so it was lying at the top of the gun. "That definitely isn't a match the the FX Copper anodizing". Not only was the color lighter, more Gold than Copper, the texture was way off. FX Bead Blasts the M4 Copper parts before anodizing to give them a Satin texture. The Backbone had not been textured prior to anodizing and had a "Shiney" smooth finish. Completely disappointed I fired off an email to Utah Airguns explaining the situation. I stated that I fully understand that anodizing batches can run different and asked that they check on hand stock to see if they can find one closer in appearance to the the FX Copper. The weekend passed and I checked back in on Monday. I was told the Backbones they had in stock had all been checked and they matched the appearance of the one I had received. I requested to return it as it wasn't as advertised and did not match the Copper anodizing of my M4. I was advised on how to return it and that a "Restocking Fee" would apply. I then asked if a return shipping label would be supplied and was advised that return shipping would also be an additional expense to me. I boxed it up and sent it on it's way. In the end, it ended up costing me $52 out of pocket (Restocking fee + initial and return shipping) to once again discover that you cannot trust the advertising from most of the Dealers and Manufacturers in this industry and none of the Hype posted on social media from them. This is the second time in a year that I have been mislead to believe that the items you are selling are true representations of the product advertised. So bottom line.. the AirMarksman Backbone that is advertised as a match for the FX Impact M4 Copper anodizing is NOT a match, it isn't even close. BUYER BEWARE.

Update 11/15/24 - Out of the blue I received a call from Josh at Utah Airguns this afternoon wanting to follow up with me in regards to my buying experience. Color issues aside, they wanted to apologize for the "Re-Stocking Fee" and make it right. I was credited the fee. In response to all the responders of the initial post I'd like to reaffirm the "Point of even why I made the post". The end point was and still is that I wanted to prevent any fellow forum members from having the same disappointing experience. Airmarksman makes awesome products and I own several of them and this experience won't keep me from buying them in the future. I'll just be a little more careful and ask lots of questions prior to placing an order.

Cheers,
Tom






Here's the video example: BIG DIFFERENCE!!

I’m selling my .30cal 700mm with superior slug liner. Gun came with Saber Tactical rail, stock, bag rider, tungsten hammer, power block, power Plenum, Donny FL Fatboy moderator, and HUMA high pressure regulator. Two magazines one in .22cal and .30cal. Also Monstrum 6x24 FFP scope. Gun is in a very good condition. Please see pictures.

Bonus 21 unopened boxes FX Hybrid Slugs. What you see is what you’ll get.

I’m asking for $1,950 plus free shipping. CONUS only. Accepting PayPal ( friend and family ) or Venmo. If you have any questions please feel free to contact me at (805) 407-6228 cell. My name is Song V or You can search for me on YouTube under “AirSniper”.

I just got a new Airacuda Max .22
I just got the rifle out of the box and noticed these two holes and it looks like oil has been leaking from them. Can someone tell me what these holes are for? Thanks

I want to pick this Discovery HS 6-24X50SF scope (made in China) for my Kral Mortal x because the scope itself has a rail mount on top that I need for attaching another red dot/laser sight;


Discovery


At the same time this Steiner 6.24.50hd FFP scope is well known and made in Germany but doesn’t have that railing.


Steiner

Is the difference between the two significant when it comes to quality and precision?

I asked a new cap of the moderator to be made in order to receive, additionally, a Donny Moderator:

I have for sale a brocock Sahara sniper xr with matching 0db 110c moderator .22 caliber. Sealed can of 15.89 grain exact jumbo pellets. 500 ct. It's only been shot about 200 times. Holds air. No problems. Ended up getting a different rifle. Asking $1150 shipped conus. Purchased November 2023. Text 307-630-6531 if you want info or other pics. Target was shot at 40 yards

Selling what you see.
300 cc tank
2xgrips
o rings
extended locking pin
pressure tester adapter
magnets
2xkit that includes crucial components like the piston, valve…..
$300 for all won’t separate
PayPal f&f

Hi everyone! We’re not sure what direction to go in and could use some advice. We currently have an M3 .22 sniper and we’re looking to add a .30 to the collection for hunting coyotes and raccoons. Do we repurpose/upgrade/refresh the m3 to a .30 slugger or buy a Vulcan 3 hp .30? What would you do considering the parts alone to upgrade the m3 will cost about $900 vs a purpose built .30 slugger from the factory? This is the parts list:
1. .30 700mm tensioned slug barrel kit
2. oem shroud with 3d printed end cap to fit over the tensioner
3. Orion mags
4. high pressure Huma reg
5. Huma or maybe tungsten hammer
6. oring rebuild kit
7. mubhaur’s front plenum part that fixes oring stiction….all said and done parts cost ~$900 on top of the $2K+ price tag.

We recently acquired an AGT Uragan 2 .25 carbon and I’m blown away by its ruggedness, dependability, simplicity and accuracy. It’s as accurate as the m3 .22 sniper out to 120 yards (testing out to 175 yards soon) and there is NO NEED for aftermarket parts. Heck it doesn’t even require a moderator shooting at 75 fpe! A Mod40 had no effect on quieting it down whatsoever.

I would love to hear from you guys that have owned one or the other, or both! What direction would you go in and why? I truly appreciate all advice and/or input!

For $357 then add coupon drops it to 285. I didn't buy because I need ir on all scopes but otherwise I would.

here's 6 5-shot groups on 50m with the VULCAN 3 HP .30 with one fill and factory reg and HS settings from a bench with a cheap bipod and no back-bag.
chronograph numbers in the pictures below.

to my surprize, the best group (but only by a mm) was the 3rd with the super cheap low quality hand-knurled KINGPB-82 brand 63gr slugs i got form a special offer at Krale. (i also adjusted the scope for this group, based on the results of the 2 previous groups.)

i wanted to find out how the lighter 54gr vs. the 63gr and 68gr are, since i am looking for a slug mold. i would very much like to try out the

NOE 300-68-FN-BI3 4 Cavity RG4 BT slugs and get one of the molds, but they are sold out. (looking for one in the classifieds!) i think they will be the better choice for long distances from what i've read here.​