Taipan Mutant

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"MrAirgun"Baffles look similar to my Colibri (which is also a very quiet gun)

My Vulcan has the newer baffles (like my colibri) but it's a lot louder. I think the Vulcan action is very noisy compared to other guns.

I guess the Mutant having a really quiet action and this style of baffle makes for a super quiet gun.

How does the hammer chamber look on the Mutant? The action on my Colibri is very quiet but the hammer is effectively sealed in a chamber in the action (to the point if you block the vent holes on the hammer adjuster it will slow the FPS due to the vacuum slowing the hammer). The Vulcan has a very open hammer setup and is super noisy.

I wouldn't mind trying a Mutant but don't think there's a place for it in my line up. Can't see me ever selling my Colibri and wanother .22 bullpup may be a waste (he says with a .177 cricket, Colibri and a .25 Vulcan lol)
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The way the gun is designed definitely has something to do with how loud it is. Two guns putting out equal power with the same LDC do not always sound equally loud. 

Nobody (who is willing to share the info) seems to know exactly what the secret sauce is though. My belief is that it is mostly about how efficiently it uses air and what happens to the excess air. 

If I shoot something that doesn't make good use of air, such as a cleaning pellet, the noise is twice as loud, which tells us something. 

The Vulcan is one of the louder bullpups but it isn't a fair comparison between a 25 Vulcan and a 22 Mutant. You would need a 22 Vulcan and a Mutant standard to see if the difference in design makes a difference to the noise. 

The main reason the Vulcan 25 is loud is because it is putting out a lot of power through a shorter barrel (than the Wildcat and Cricket 25). That's the problem with shorter 25 cal bullpups. You lose the benefit of the reduced length because they almost always need an additional LDC to use them in the backyard. 

If I look at the Mutant with an eye to what's different than my other guns, the breach assembly is noticeably longer, chunkier and more solid. There are a few more screws holding things firmly in place. Other than that, I can't see much. 
 
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I also think that the air efficiency maybe the main reason why the Mutant is significantly more quiet. The difference is day and night between the .25 Vulcan and the Mutant. I just ordered some. JSB Beasts (34gr) that I never tried before and hope to compare the .22 Mutant with the .25 Vulcan using JSB MKI or MKII. I think the Mutant has enough HST adjustment left and/or a large enough port to move the 34gr pellet at last 850fps. 

Would the factory shroud from a Mutant fit on a Vulcan .22? Aren't' the threads on both 1/2" 20 UNF? If yes, then only the available barrel length may be an issue.
 
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"fe7565"I also think that the air efficiency maybe the main reason why the Mutant is significantly more quiet. The difference is day and night between the .25 Vulcan and the Mutant. I just ordered some. JSB Beasts (34gr) that I never tried before and hope to compare the .22 Mutant with the .25 Vulcan using JSB MKI or MKII. I think the Mutant has enough HST adjustment left and/or a large enough port to move the 34gr pellet at last 850fps. 

Would the factory shroud from a Mutant fit on a Vulcan .22? Aren't' the threads on both 1/2" 20 UNF? If yes, then only the available barrel length may be an issue.
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It would be the bore size of the shroud that might be the issue, if there was one. Other than that, if it's the same threads then you can attach it. 

I would probably ably want a larger shroud for a 50fpe gun than a 35 or 25fpe gun though. You need a 22 Vulcan for the test.
 
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Zebra
I've been following this post and drooling for days. I finally got my hands on my first ever bullpup this weekend. I went with a really nice used Colibri for $1000 shipped with an awesome hard case. From all the problems I have heard folks have with these birds I figured I would be sending it to Ernest Rowe right off the get go?

But to my surprise it is a really nice working little bird. No issues at all other than a self induced one?
When I first put the bipod rail sleeve on the end of the air tube it was too thick and the top of the sleeve was rubbing against the shroud causing POI shifts when the tube would flex after fills. I had to grind the top of the sleeve down to fit under the shroud and went ahead and slid it all the way back next to the action. Got enough clearance to slide 4 one dollar bills between the top of the sleeve and the bottom of the action block right under the barrel.

I'm loving this baby more and more every day. Been using a 44 cu ft tank with my rifles, so I just bought a nice used Guppy to go with my Bird and they really compliment each other in ease of use. She's shooting the 18.1 gr JSB's at 890 FPS and no problem getting it to shoot 4 mags on a fill.

I must confess, I have seen the light. Lovin' the pup. Might have to sell the .22 Cricket carbine and get a Mutant now? LOL

Here's some photo's



I found this cool photo where someone posted their Mutant shorty next to a Ranchero. Wow, that is so tempting!



I decided to show some comparisons of my Bird with some of my rifles.

.177 Cricket Carbine and the Bird


HW30 and the Bird


Thomas and the Bird




 
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You wouldn't be the first to see the light once they try a bullpup. It just makes more sense for a compact pcp gun than any other design. 

There are people that make all sorts of claims about the limitations of bullpups like "they aren't as comfortable" or as accurate etc but I never found there to be any basis in fact. Sometimes they just haven't actually tried one, others tried just one an declared all bullpups, present and future, to be "not for them". Not all bullpups are well designed but the ones that are feel no different to regular rifles when you are shooting, except easier to carry and point. 

The pic of the Colibri next to the Cricket carbine illustrates the point quite well. The length of pull looks to be about the same. The cheek position in relation to the scope rail is about the same. Your grip and hold would be the same. The difference is that you don't have all the weight out front - making it feel extra heavy when you shoot off-hand. 

If you like the Cricket and the Colibri, you'll love the Mutant.
 
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Oh yes, people talk of the mutant trap, I would hold their assessment accurate. I have a certain nomenclature concerning the Colibri or Hummingbird made by Kalibrigun. That word would be, "Cult" because they are rare and the people who own and hold them dear sing praises of their function. Mine has had 1) leak of o-ring around regulator. - sent to Ernest under warranty. 2) blowback if not cocked forward all the way. 3) indexing malfunctions caused by a poor disign. - fixed by fastioning a spring to the indexing paw as to keep it properly aligned.

now the spring breaks after a couple tins and I have to replace it with another custom stretch and snip job.

The end result is 18.1 at 883 60 to 70 shots per fill. Very quiet. Very nice trigger.Very accurate with a front rest while shouldering - I mean 5 shots at 30 within a 3/8" ragged hole! Butter smooth indexing and a tight compact hold that nestles into your shooting stance. 

I was resently selicitated to sell mine via an e-mail. Never!

I only wait now in Airgun pergitory for the launch of the .25 cal bird. I will be one of the first on the list. Please Kalibrigun find some time to grow beyond the cricket and the ocelot, and bring back the BIRD.
 
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There was a lot of talk about bringing the bird back from Kalibrigun,
Then the release of a lot of new bull pups from other manufactures . Then Kalibrigun went silent?
Maybe when the dust settles a new bird will be released ?
I do think with the release of the Mutant it made a lot of the Manufacturer's step back a little,
It had to, This little gun at 1,200 bucks is amazing ,
Mike
 
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There was talk about bringing back the Colibri, just not from Kalibrgun....

I don't think Kalibrgun should bring back the Colibri. It wasn't well designed and the Cricket action is more reliable. Lots of companies use the same action for multiple models where the goal is to make guns that look different. You only bring out a whole new action when you have something to add. 

I'd prefer to see some factory upgrade options for the Cricket instead of a whole new gun. All they would need to do is create a new (and more stylish) stock with a forward cocking mechanism upgrade and the Cricket would have renewed interest. The Cricket bullpup is accurate, efficient, (relatively) quiet. It has larger capacity mags than the Wildcat and an HST adjuster. A lighter stock and forward cocking brings it up to date. The same goes for the Mutant too. 

What I definitely don't want to see is any more "hybrid bullpup carbines" or expensive air guns that aren't well made. 



 
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Just joined the Taipan Mutant fanclub as I have just bought a used one sub 12ftlb [ UK legal] I have a problem that it doesn't seem to load { cock smoothly] FOR SOME REASON!! it only fires if you pull the cocking lever quite hard the last 10 mm of travel all the way back quite hard also the trigger is like a hair trigger!
Looked at Ernest vid for trigger adjustment which all seems well when rifle not cocked but soon as I cock it trigger seems to stick for some reason also seems as if hammer spring is under too much tension as its quite hard to pull back cocking lever, thanks for taking the time to look at my post.
 
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The cocking lever does get a bit hard during the last part of its travel. It needs to compress the spring and lock in the hammer. It's not like you need to struggle with it, but not as smooth as the FX Impact albeit it's easier than the Vulcan. If you have to struggle with yours there may be some adjustment inside that top section where the level is. You may need to take that cover off and look as described in one of Ernest's videos (the video on switching the lever to the other side). Check and see how the bolt probe moves. For details on hammer/spring I let others who know more about it chime in.

Your trigger issues and the lack of proper cocking may be connected. That's because the trigger may be misadjusted. When I adjusted the trigger, contrary to what was said, the first stage and second do affect each other. Not as much as the Vulcan where I was able to fire the gun just by tapping on it (do not mis-adjust it like that), but there is a correlation and overall could affect how the hammer gets locked in. Again, I let the experts chime in more.
 
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"evenbad"Just joined the Taipan Mutant fanclub as I have just bought a used one sub 12ftlb [ UK legal] I have a problem that it doesn't seem to load { cock smoothly] FOR SOME REASON!! it only fires if you pull the cocking lever quite hard the last 10 mm of travel all the way back quite hard also the trigger is like a hair trigger!
Looked at Ernest vid for trigger adjustment which all seems well when rifle not cocked but soon as I cock it trigger seems to stick for some reason also seems as if hammer spring is under too much tension as its quite hard to pull back cocking lever, thanks for taking the time to look at my post.
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I had the same problem when I cranked the hst all the way in to see what the maximum velocity I could get was. I couldn't get the rifle to cock when the hst was all the way in and the lever was hard to pull back. My Mutant was quite a bit louder and harder to cock when I had the power all the way up. 
 
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"evenbad"Just joined the Taipan Mutant fanclub as I have just bought a used one sub 12ftlb [ UK legal] I have a problem that it doesn't seem to load { cock smoothly] FOR SOME REASON!! it only fires if you pull the cocking lever quite hard the last 10 mm of travel all the way back quite hard also the trigger is like a hair trigger!
Looked at Ernest vid for trigger adjustment which all seems well when rifle not cocked but soon as I cock it trigger seems to stick for some reason also seems as if hammer spring is under too much tension as its quite hard to pull back cocking lever, thanks for taking the time to look at my post.
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Sounds like yours is broken. Send it back to where you bought it and get it replaced if it's new.

I have no idea what's wrong with yours but I can tell you that mine is not at all hard to cock or load. It has the nicest cocking action of all my air guns. It's easy to pull back the lever and it makes a satisfying clicking noise. The trigger is light and crisp too.

As you have a 12 ft lb version, I doubt it has anything to do with the how the HST is set although, I must confess, I have no idea how they mod the guns to limit the power for the UK version. You mentioned that it is particularly difficult to load a pellet. I would be checking the pellet probe first. If the probe was bent, damaged, or not properly aligned etc, that could make it harder to cock and chamber a pellet. 

The other thing that makes it hard to load a pellet is using pellets that are too large for the gun. JSB monster, for example, grind and crunch when I index them in some of my 22's. 


 
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The fat boy works great, Very quiet, I took a six inch LDC off and installed the fat boy, It works way better than any LDC I have had on the Mutant.
I am not sure I can post another vender on this site, But go over to TAG look under Mutant and you can find Donny pretty easy.
Donny said he has another Brain storm for the fat boy and is going to send it to me free , I just need to see which one works best and send the other back.
My Mutant is beyond back yard quiet, Well you can hear the pellet hitting the back stop at 48 yards,
Mike 
 
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