The much-anticipated Stoeger X20 Suppresor air rifles arrived at Archer Airguns today. We’ll be shipping the first units out to customers tomorrow!

This first test report is based on standard “Gold Service” tests that I undertook on two guns chosen completely at random. One is in .22 caliber, the other in .177 cal. The “Gold Service” test targets are shown below. Although I’ve handled the Suppressor before, this is the first chance I’ve had to fire one.
First, a BIG surprise! Both were very strong guns, giving 25 - 26 ft/lbs of muzzle energy. This is significantly greater than any X10 or X20 I’ve ever tested before. These normally pull 15-16 ft/lbs of muzzle energy. It’s even more than the typical performance of .177 caliber X50s which normally fall into the 20 - 22 ft/lb range. Sure, they’re still dieseling, but surely not that much! Time and experience will tell if this level of power is typical or exceptional...
Here's the .22 cal test target.

Appearance of these Suppressors is good, matching the standards seen on other Stoeger Airguns, with dark bluing and flat black stocks. The barrel/suppressor is covered with a textured black plastic material. Overall, the appearance is very tactical and practical.
Cocking was easy and the triggers pulled fairly predictably but with that typical Stoeger 4 - 5 lb pull weight that somehow feels heavier than it actually is. My impression was that the trigger pull was not so long as on other models, however. The trigger assembly looks identical to that on the standard Stoeger X10, X20 and X50 models so a GTXaa trigger up-grade should fix that in style!
Accuracy was at my usual average level for shooting springers. You’ll probably do better - most people seem to shoot spring/piston air rifles better than me!
The scope is not AO, but I was able to see the target sharply at 10 yards once I had adjusted the eyepiece focussing ring. The scope is quite compact - slightly shorter than a Leapers Bugbuster - and has a simple duplex reticle with an aiming dot at the center. This dot can be set to glow red or green, if required under low lighting conditions.
Below, the .177 test target.

But what about the noise level? After all, this is the great selling point for these air rifles...
Well, one obvious result from testing these two guns is that the .22 was significantly quieter than the .177 caliber model. Confirmation came from my wife, who’s used to hearing our “Gold Service” testing. “Wow, that’s quiet.” was her comment on the .22.
But I found the tested .177 still to be quite loud. This is probably connected with the fact that the muzzle velocity of the .177 was over 1,200 fps. That’s well above the typical 920 - 950 fps muzzle velocity of .177 caliber X10 and X20s. It’s also above the speed of sound and the loud crack was due to the pellets going supersonic - a silencer is not going to change this. With only one gun tested so far, I don’t know if this will be typical.
As the .22s were not breaking the sound barrier, this gun was much quieter - with shots sounding like a dull “thunk” rather than the sharp, high-pitched crack of the .177.
Should .177 muzzle velocities drop back below 1,100 fps as the gun burns residual oil in the compression chamber and “dries out”, the noise level of the gun should drop significantly. Again, more testing will give us the answer.
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