I've been looking at these two...
The RX-2 uses a "Gas Spring" for it's Powerplant! When the gun is cocked, the stroke compresses a cylinder of air instead of a mainspring. When the trigger is pulled the compressed air expands and drives the piston forward, however the sealed air is never expended. The power can be adjusted with the optional hand pump and pressure gauge. This system produces a pronounced jolt during firing, therefore a short lock time is incorporated in the action. A classic stock is provided that sports a rubber butt pad, grip cap, with white line spacers, and fine checkering adorns the grip. The RX-2 comes with windage and elevation adjusting rear sights, hooded front sight and scope dovetails machined into the receiver. The RX-2 performs at velocities of 1125 fps in .177 caliber, 950 fps in .20 caliber, 860 fps in .22 caliber.
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The power of the Eliminator has been achieved by combining a long stroke piston, specially developed piston recoil damper valve and the tried and true Theoben H.E. gas spring system.
Power remains unchanged for thousands of rounds with minimal maintenance required resulting in excellent reliability. In fact, in many situations this rifle will rival the job that a rim fire rifle can do without the problem of over-shooting.
When using the pellets recommended by Theoben, the accuracy achieved by well known target shooter and writer Terry Doe was outstanding, even at 50 yards. However, care must be taken on selecting pellet types because many just won't stand the velocity.
The Evolution Trigger mechanism is based around a falling block system. It is a fully 2 stage unit with adjustment for second stage weight and travel. It is set up with a standard pull of 1.5 lbs.
The .22 caliber is fitted with an Anschütz barrel, the .20 and .25 calibers with selected Walther barrels. Both barrel types are high quality and they are choked so accuracy is guaranteed. The stock is made from African Hardwood called Hyedua (shed-u-a), extremely pleasing to the eye and completely stable in use.
Specifications
* Break barrel action
* FAC Power (FireArm Certificate/Full Power Version)
* H.E. Gas Ram System - No Maintenance & No Recharging
* .22 Anschütz Barrels, choked
* .20 and .25 Walther Barrels, choked
* Dampa Mounts
* Weight: 8.9 lbs unscoped
* Length 45"
* 2 stage trigger - 1½ lbs pull
* Automatic Safety
* Hyedua Stock
* Right Hand Eliminator Stock or * Ambidextrous Crow Magnum Stock
Caliber .25 (6.35mm) .22 (5.5mm) .20 (5.05mm)
Pellet Type: H&N Trophy , Crosman Premiers
Weight: 20 grns 14.3 grns
Created for the serious airgun hunting enthusiast, the Eliminator/Crow Magnum IV is the ultimate high performance field sport rifle. At the heart of this extraordinary hand-build gun is the famous HE gas spring system; a self-contained power unit that affords both maximum power and reasonable cocking effort in a single design. The HE gas spring system can also be held in cocked mode for extended periods, without the fear of fatigue associated with conventional metal mainsprings. It's ideal for field situations where a hunting rifle must be ready for immediate use!
But the Theoben Eliminator/Crow Magnum IV isn't only about raw power. Virtually hand-build from the ground up, each rifle is a showpiece of European gun-making art. The fine ordinance steel barrel and action is meticulously hand polished and blued to custom grade standards. The elegant right-handed sporter stock (Eliminator) or ambidextrous stock (Crow Magnum) is carved from exotic Hyedua, an African hardwood that is stronger than European beech, while being comparable in beauty to select American Claro walnut. Finished to a flawless satin sheen, the stock also features a full-length tapered forend, hand-cut checkering, high comb with raised cheekpiece and a ventilated rubber recoil pad.
Other standard Eliminator/Crow Magnum IV perks include an adjustable two-stage trigger and automatic safety that can be quickly disengaged in complete silence. Hunters will further appreciate the elegant steel Eliminator muzzle weight, which adds steadiness to offhand field shooting. Likewise for the famed Dampa Mount system, with its unique recoil-absorbing rubber bushings. It's no wonder why the Eliminator is American's premier sporter rifle!
Model Cal Total Weight Overall Length Velocity fps Muzzle Energy Cocking Method Cocking Effort Recoil Rating Power Plant
Eliminator .20 8.9 45.0" 810-1062 22-24 fpe Break Barrel Heavy Heavy Gas Ram
Eliminator .22 8.9 45.0" 706-938 24-26 fpe Break Barrel Heavy Heavy Gas Ram
Eliminator .25 8.9 45.0" 616-818 26-28 fpe Break Barrel Heavy Heavy Gas Ram
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Weight 9.8 lbs. , OAL 45.7" , .177 Velocity 1125 fps , Muzzle Energy 18.3 FP , ACC c-t-c .16" , Break Barrel Cocking, 46 lbs Cocking Effort, Gas Spring Power plant, 12 Groove Rifling, Beech Stained Stock, Two-Stage Trigger, Automatic Safety
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This one is a brute at $419
The Sumatra Carbine is one very, very powerful .20 caliber, lever action, pre-charged pneumatic (PCP) rifle. If a person is looking for a rifle that can reach out to those longer distances (over 50 yards), then this has got to be the gun for that purpose. The .20 caliber rifle shoots very flat, as one would expect from a gun that shoots Eun Jin .20 caliber 24.5 grain pellets at 995 fps (54 fpe). Even the most popular, better-known pellets yield some startling velocities. Beeman .20 caliber Kodiak pellets were chronographed at a whopping 1059 fps average, Crosman Premiers .20's at 1200 fps average and Beeman .20 FTS' at 1159 fps average. Velocities of this magnitude will certainly make for a very flat trajectory coupled with a huge amount of knockdown energy at the target.
The Sumatra Carbine offers 13 power levels and the pellet test figures quoted above were shot at high power. The gun is so powerful at 50% of the .20 caliber pellets shot well over the 1080 fps speed of sound with the highest velocity at full power being 1242 fps. To bring those velocities down to a lower level, simply shift to the lower power(s), which is done easily by turning the power wheel in front of the trigger in either direction after fully cocking the gun.
Along with it's other features, the Sumatra Carbine is advertised to have an accuracy rating of 3/8" ctc at 30 yards using Eun Jin pellets. We didn't do that testing and assume that it comes from factory tests but from the shooting we've done with the Sumatra we sure don't see any reason to doubt the results. It shot well with all the pellets we tested. In addition the barrel is threaded for add-on accessories and the trigger is a two stage adjustable unit. But the most noticeable feature is the 6 shot rotary magazine. Due to the Sumatra's Korean heritage, a lot of shooters will be comparing the Sumatra to the Career 707. And the most noticeable difference is the rotary magazine instead of the in-line magazine used by the Career. While both style magazines function flawlessly, we do find that the Sumatra's rotary magazine has an advantage over the in-line magazine of the Career. That advantage is that pellets of any length in a given caliber can be shot in the rotary magazine by simply loading them. In fact, a shooter could load 6 different length pellets at the same time. The Career's in-line magazine requires that the stock be removed from the gun and the pellet port altered to accommodate every different pellet length. That is a decided advantage for the Sumatra for the shooter that likes to try different pellets.
In summary, I would have to say that the Sumatra Carbine will quickly become a favorite in the airgunning world due to it's great power, excellent accuracy, ease of use and low price point. This rifle is a steal for anyone looking for a powerful PCP rifle. As more calibers are added, the rifle's attractiveness will increase even more. Check this one out closely if you're a hunter.
Model Cal Total Weight Overall Length Velocity fps Muzzle Energy Cocking Method Cocking Effort Recoil Rating Power Plant
Sumatra Carbine .20 7.0 35.5" 995-1242 24-48 fpe Lever Action Easy Light PCP
Sumatra Carbine .22 7.0 35.5" 1002-1186 31-62 fpe Lever Action Easy Light PCP