Twinmaster Air Hunter
Carbine      
Jim Chapman
Flying into Las Vegas for the
SHOT Show earlier this year, I
was eager to see what the airgun
manufacturers had in store for us. I
arrived Friday night and had to
leave for a conference in Germany
Sunday morning, which left me with
one full day on Saturday to cruise
the show. I spent my limited time
running from one Airgun booth to
another as fast as I could, followed
by pre dinner meetings, dinner
meetings, and after dinner
meetings. But even under these
time constraints I kept finding
myself drawn back to the ROHM
GmbH booth to look at two new
rifles they were introducing; the
Twinmaster Air Hunter Rifle and Twinmaster Air Hunter Carbine. These guns were both things of
beauty, but it was the Carbine that really caught my eye: the precisely shaped thumbhole stock, the
shrouded carbine length barrel, the solidly built bolt action, and the light crisp adjustable trigger all
impressed. After my second or third visit I sat down for a chat with the product and marketing guys in
attendance, and was treated to a demo of and discussion on these yet to be released rifles. We agreed
that when test guns were available, they would ship me the pair to get in some preliminary range and
field time. As the months flew by, we kept in loose contact with an understanding they would be
shipped as soon as a pre-release run of test guns was available. Then one day in June, I was notified
that the brace of Air Hunters were being shipped and would be reaching me soon. I had some fun
getting them through customs, a long story that I’ll go into another time, but eventually found myself
sitting in my gun room opening a shipping container that held two packing boxes. The rifles resting
therein had both made the long journey without incident or damage.

And a nice set of guns they were! Both of them dressed in laminate thumbhole stocks with stippling on
the pistol grip and forestock. After a quick visual assessment, I cleaned the guns, attached the bolt (the
only piece of assembly required), mounted a scope, filled the removable reservoir and charged it to
3000 psi, then sat down to sight in. I always bore sight my guns before the shooting then site in at 10 m
on my indoor range. The first three pellets sent down range through the carbine formed a slightly ragged
hole 3� inches low and a 1� to the right. I’ll get into the accuracy in detail a little further
along, but want to say the first three things that I took note of were a) the stock was a great fit, b) the
trigger was light and crisp, and c) the gun was very quiet. Sometimes, and it doesn’t happen often,
you pick up a gun and it just “feels� right. My AA S410 FAC and Falcon PF 25 are two models
that exemplify this; there are several great guns on the market but these two just felt good from the start.
And extensive shooting and hunting experience with the rifles confirmed their promise as exceptional
hunting arms. I had the same feeling with the Air Hunter Carbine, though carried on with the objective
of maintaining a critical eye.

Fit and Finish
The level of fit and finish is very good, as one would expect from a gun at this price point. The laminate
used for the thumbhole stock looks more like a traditional Walnut than the flashier muliti hued veneers
often used in today’s laminate stocks. I think this gives the rifle classy good looks. The stippling on
the pistol grip and forestock is well executed, and gives a good grip on the gun when the weather gets
sloppy. All the metal work is deeply blued, and is well formed without machine marks or defects. It is
solid without being bulky. A standard Weaver scope rail is factory installed, and I used it to mount a
Hawke Map Pro 3-9x 40 variable scope. I found this carbine balanced very well, and the cheekpiece
offered up a good sight alignment with the scope and medium profile rings used to mount it.
The Mechanics
The Air Hunter Carbine is available in .177 or
.22 caliber (my gun is .22) and can be set up
as a single shot using a loading recess insert,
or as a repeater using a five shot strip
magazine. Both the loading recess and the
strip magazine will be included in the base
package. The compressed air is supplied via a
removable cartridge that has a fill rating of
3000 psi and yields approximately 40 shots
per fill. The distal end of this air reservoir has
an onboard monometer so that air pressure
can be continuously monitored. This is a
regulated gun, and the regulator is set to
reduce the pressure to approximately 1950
psi over the 40 shot string. A filling adaptor
that screws into a standard DIN tank fitting
comes with the rifle. The reservoir screws
onto this fitting, and after charging is
automatically bled off as the cartridge is
unscrewed. Therefore no external bleed valve
is required.

This gun is cycled with a bolt mechanism, but
is actually cocked by the compressed air
pressure. If there is no charge, the gun cannot
be discharged. The bolt is well proportioned
and the action is smooth, I find that I can load
and chamber a pellet very quickly. The
triggers functional parameters; pull weight,
slack, stop and force are preset at the factory
with the weight preset at approximately 2 lb.
The triggers position / finger distance can be
adjusted using an Allen key. What is unique with this trigger is that there is virtually no stacking; the
pressure one needs to exert to release the sear is a few grams. I really like the tactile response of this
trigger for hunting, not too light but at the same time it breaks very crisply.

Performance
I shot Crosman Premiers, JSB Exacts, and Eu Jin ,22 pellets for my initial shakedown of the Air Hunter
Carbine. This gun is producing around 17 fpe, and performs very well with the CPs. I charged the gun to
just under 3000 psi and shot 25 shot string, getting a maximum velocity of 752 fps and minimum velocity
of 748 for a spread of only 13 fps.

The accuracy achieved with the CPs was also impressive; shooting a series of five 10 shot groups at 25
and 50 yards I obtained .31 and .62 inch ctc groups respectively.  I have had good terminal performance
on small game with CPs over the years, so decided to make this my hunting round. I think the
combination of the quality barrel, well regulated air charge, ergonomic stock and the excellent tactile
response of the trigger results in a very shootable and accurate package.

In The Field
On my first hunting trip with this carbine, I carried it for a day of rabbit hunting on a friend’s farm.
The garden on his property was working as a magnet for the local bunny population, and he asked me to
thin out their numbers a bit. I take these pest control duties seriously as this is one of the properties I use
for deer hunting when season comes around, and you want to keep the landowner happy! I rolled up late
one afternoon, and scattered a few rabbits that had been feeding in the small park-like field in front of the
farm house and bordering the 2 acre garden patch. I unloaded the Air Hunter and stuck a small pouch of
CP pellets in my shirt pocket before starting out.  I moved to the edge of the cultivated area using the
trees and bushes to shield my approach, before sitting down next to a small tree with an overlook of both
the field and the garden. After a
short wait rabbits started to appear but
they were all out of range. Then I noticed
one come out along the edge of the brush
line at about fifty yards. I lined up the shot
and squeezed the trigger, the light, crisp
break along with the effectively silenced
report allowed me to watch as the pellet
dropped right on my point of aim! The
rabbit rolled over, anchored on the spot. A
similar scene played out a few more times
with shots taken and made at 40 to 65
yards, before diminishing light sent me
packing. The outing did give me enough
shooting to appreciate how well this
compact carbine handled in the field. On
this trip I had the single shot loading recess
in place, and found that I could easily and
quickly feed the CPs and cycle the shot.
The accuracy was outstanding, every shot
was dead on target and every aspect of
the gun was exceptional; they way it
carried, the way it came to the shoulder,
the sight alignment, and the responsive
trigger made it a lot of fun to hunt with.
My next trip out found me chasing ground hogs, where shots sometimes have to range out a bit further
and the quarry is a lot bigger. I was using XP 18 grain pellets this time, and in testing had found them to
be accurate with the Air Hunter. Past experience had also shown me that they perform well on whistle
pigs. Long story short; I stalked a series of fields but these late summer survivors would not let me get
inside a hundred yards. I’ll reach out for a jack rabbit or prairie dog this far, but not an animal the
sized of a well feed ground hog. This did give me a chance to walk, trot, leopard crawl, and crab walk
with the gun, which reconfirmed my earlier assessment that it carried well in the field! Finally on my way
back to the car, I looked up as I walked through a stand of trees and there in a small clearing sitting
atop a log was a plump hog staring at me. I slowly raised the rifle and shot, taking him with a headshot
as he prepared to vacate the area. He flopped over dead, and I counted off 32 paces as I walked over
to collect him. As a rule, I’m not going to use a .22 air rifle for any prey much larger than this, and
in my view the knock down performance of this gun satisfies my hunting needs for an air rifle in this
caliber.

Opening day of Indiana’s squirrel season found me in the woods at daybreak, in full camo with the
carbine in hand. I moved to a den tree that I’ve hunted a few times over the years and settled in for
a wait. After a half hour, nothing was happening in my area but I did hear the repetitive barking of a
squirrel off to my right. Grabbing my pack and rifle I slowly started moving in the direction of the
sound, stopping often and listening. I sat at the base of a tall mast producing tree where I thought Iâ
€™d heard some movement. After a few more minutes I heard cutting and saw a telltale patch of red
fur from the fox squirrel high up. But the foliage was so heavy I could not see well enough for a shot.
Standing up, I leaned around the base of the trunk to a point that I could see the bushytail stretched out
above me. Bringing the rifle to shoulder, I leaned back and lined up a bead right on the noggin. The
thumbhole stock allowed me to comfortably hold the rifle in this awkward position, and shooting almost
straight up I squeezed the trigger. A plump red squirrel dropped through the branches landing at my
feet. Within two hours in the woods, I had three nice fox squirrels loaded into the game pouch of my
pack.

Initial Impressions
I believe that when released to market the Twinmaster Airhunter Carbine will find a strong following
with North American hunters looking for a qulity hunting rifle to use on small and medium game. In my
opinion accuracy, power, and a low sound signature is the perfect trifecta in a hunting airgun. The
ergonomic and well executed design of this carbine is icing on the cake! In my next installment, weâ
€™ll look more closely at the full sized Airhunter rifle
Air Hunter Carbine Specifications
Following are the specifications on the
Twinmaster Air Hunter Carbine shown
in this article
Caliber                     .22     (5.5 mm)
Overall length           96.8 cm
Barrel Length            43.0 cm
Weight                     3.5 kg
Fill pressure              300 bar (4500
psi)
Shots per charge       40