Umarex Glock 17 Gen 3 CO2 Blowback BB Pistol Table Top Review

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Type: Blowback CO2 BB Pistol.
Manufacturer: Distributed by Umarex.
Model: Glock 17 Gen 3.
Materials: Metal & Polymer.
Weight: 1.6 pounds (726 grams).
Barrel: 4 inches metal non-rifled.
Propulsion: CO2 x 1.
Action: Semi auto blowback, double action only trigger.
Ammunition Type: 4.5mm steel BB's.
Ammunition Capacity: 18 round drop out full size metal magazine.
FPS: Claimed 365.

Trigger Pull: The trigger pull on the Umarex Glock 17 Gen 3 CO2 Blowback BB Pistol is in a way a single action trigger since the blowback action pre-cocks the internal hammer allowing for a much lighter single action type trigger pull. I call it a a double action trigger mainly because there is an indexing of a BB from the magazine into the breach area every time you pull the trigger which means the take up is long and there is a little bit of friction from the mechanical mechanism that indexes a BB.

Accuracy: At this point I have not shot the Umarex Glock 17 Gen 3 CO2 Blowback BB Pistol so I can only quote what Umarex is saying in terms of FP2 which is 365. That's sounds reasonable based on other similar guns like this that have that parcial blowback action and BB indexing system to allow for a more sealed system. We will find out when I perform my Field Test Shooting video for the Umarex Glock 17 Gen 3 CO2 Blowback BB Pistol shortly.

Build Quality: The Umarex Glock 17 Gen 3 CO2 Blowback BB Pistol seems well made overall, Fit and finish are nice and slide wiggle is minimal. There is a bit of a clanky sound when the slide cycles but since pretty much all of these types of airguns are made out of pot metal with a high con ten of zinc alloy this is kind of expected.

Realism: The Umarex Glock 17 Gen 3 CO2 Blowback BB Pistol absolutely looks the part of a Glock 17 3rd Generation, sitting on the table and even holding it in your hand you are going to think it's the real deal until of course you drop the magazine and see that it is a Co2 mag. Mostly everything operates like a real Glock 17 but the slide is not a full blowback meaning it only goes back about 3/4 as much as a real Glock 17 slide would. One other noticeable difference is the ability to quickly field strip the Umarex Glock 17 Gen 3 CO2 Blowback BB Pistol, you will need to remove a pin since the take down tabs are non functioning and moulded into the frame.
Available From: The Replica Airguns Store.


  • Great weight and feel to it, build quality seems good.

  • Really nice looking replica of the original Glock 17 Gen 3.

  • Fully Glock licensed.

  • Easy to see white dot sights front and back.

  • Recessed barrel for added realism.

  • Accessory rail for adding a laser or tactical light.

  • Full size drop out metal magazine that holds the CO2 and 18 4.5mm steel BB’s.

  • Safety built into the serial number plate area keeps it well hidden. 

  • Warning instruction are nice and discreet under trigger guard

  • Not bad feeling double action only trigger as the blowback pre-cocks the internal hammer/strike.

  • 365 fps is decent for a blowback BB gun.


  • Does have blowback action but not full blowback.

  • Slide sound is a bit clanky.

  • Sight are non-adjustable which is common with low cost airguns like this one.

  • Would have liked to have seen more pristine packaging from Glock.


Since there release of the Umarex Glock 17 Gen 3 CO2 Blowback BB Pistol we have all been waiting for a blowback version and now we have it in the Umarex Glock 17 Gen 3 CO2 Blowback BB Pistol! Defiantly another step in the right direction when it comes to a Licensed Glock. Am I looking forward to the Glock 17 Gen 4 Blowback BB Pistol, sure but if you’re a Glock fan why not have them all and this version will get you a bit higher fps and more shots per CO2 while still offering blowback action with a decent trigger!

4.5mm / .177 cal, BB, Blowback, CO2, Pistol, Review, Semi Auto, YouTube Video, Comparison Glock, Glock 17, Gen 3, Umarex