Type: NBB CO2 BB Pistol.
Manufacturer: Distributed by Gamo.
Model: P-20.
Materials: Plastic & metal.
Weight: .97 pounds (439 grams).
Total Length: 7.25 inches (184mm)
Barrel: 4.25 inches (108mm) metal non-rifled.
Propulsion: CO2 x 1.
Action: Semi auto NBB, double action only trigger.
Ammunition Type: 4.5mm steel BB's.
Ammunition Capacity: 20 round metal stick magazine.
FPS: Claimed 400.
Trigger Pull: The trigger pull on the Gamo GP-20 Combat CO2 BB Pistol is the same as pretty much all of the DOA trigger low cost BB Pistols where the trigger has to do all the work. Much of which is pulling back the fairly strong internal hammer spring which in this case is the barrel which protrudes slightly out of the front of the pistol until you reach the release point, and it snaps back hitting the valve and pressurizing the Airgun. This will give you a bit of a finger workout if you are shooting fast and want to empty out the 20 round magazine.
Accuracy: At this point I have not tested or shot the Gamo GP-20 Combat CO2 BB Pistol but I plan on making my Field Test Shooting Video the following week so stay posted for that. I do expect it to perform nearly exactly live every other Airgun made like this, and there are many that essentially have all the same internal components with a slightly redesigned outer shell, so mechanically they are all the same and should shoot about the same. It should get really close to the claimed 400 fps and I expect it to shoot under a 2-3 inch grouping, unless I am having an off day.
Build Quality: The build quality of the Gamo GP-20 Combat CO2 BB Pistol is what you expect from almost all plastic BB Guns of this type. It is not super heavy but that means less can break when dropped on a hard surface. Fit and finish are good and one gripe I have with most of these types of BB pistols built the same way, is that the grips are a bit lose so it can pop off when you pull it back. The Gamo GP-20 Combat’s grips are a lot more solid and this does help make the Airgun feel a bit more confidence inspiring.
Realism: The Gamo GP-20 Combat CO2 BB Pistol from what I can see is not an exact copy of a real steel pistol in production but it does look like a modern semi auto pistol in design. The barrel is slightly recessed, and the CO2 tab is also hidden inside the grips, so unless you get close to the pistol you would think it could be the real deal. That said some giveaways are the moulded into the slide ejection port and the screw holes on the right side of the two plastic halves of the Airgun along with the kind of out of place standard safety switch that looks more like something you would find on a piece of electronics.
Pros:
Very low cost and simple design will make it reliable.
Fit and finish looks decent for an all plastic gun, grip are actually pretty tight.
Picatinny rail for adding accessories like a laser or tac light.
Standard metal stick magazine found in lots of Airguns for cross compatibility.
Right hand screws are very small and less obvious then some other two sided low cost plastic Airguns.
White dot sight up front and fiber optic in the back are easy to see on all backgrounds..
Safety is right above the trigger finger so easy to switch if you are right handed.
Recessed barrel for added realism.
Cons:
Some more metal would have been nice, but typical of a low cost BB shooter like this.
Double action trigger does require some work, so action shooting will be a bit harder.
Not a lot of working parts other than the trigger, safety, and magazine release.
Comments:
I have reviewed many CO2 BB Pistols built exactly like the Gamo GP-20 Combat CO2 BB Pistol, so it is at least for me, not the most exciting Airgun review but I always enjoy the chance to shoot even the most basic of Airguns. I would say the Gamo GP-20 Combat CO2 BB Pistol in this category is one of the nicer options as I feel Gamo stepped up the build quality just a bit, even if it was just to make the grips feel more solid and less prone to popping off when loading CO2. It is a little bit beefier than similar CO2 BB Pistols in this category so maybe not the best for smaller handed individuals but good for someone like me with larger mitts. The price is right for sure and with its simple design, it should perform as expected for a good long time!