The Glock 17 Gen5 CO2 Pellet Air Pistol with Blowback is one of those rare air pistols that gets everything right: licensed Glock authenticity, a proper blowback slide, and the accuracy advantage of a rifled barrel firing .177 pellets. If you have been eyeing the Glock range and wondering which model is the one to buy, this is our pick — and here is why.
First Impressions
Out of the box, the first thing you notice is the weight: 830 grams of polymer and metal in a 1:1 scale body measuring 202mm. It feels exactly like the real Glock 17 should, with the Gen5 detail work all present — the front serrations, the reversible magazine release button, the trigger safety, and the generously sized grip. The official licensed Glock markings are crisp, and the finish is flawless.
Performance
This is where the Gen5 pellet version separates itself from the BB-firing Glocks in the range. Instead of steel BBs, it feeds 4.5mm (.177) pellets from its 21-round magazine by means of a chain — a clever system that keeps pellets seated securely and feeds reliably shot after shot. Because pellets engage the rifled barrel properly, groupings are noticeably tighter than you get from a smoothbore BB shooter, and that makes every range session more satisfying.
Power comes from a single 12g CO2 cartridge housed in the magazine, delivering around 3J (roughly 394 FPS) in semi-auto. The blowback action kicks the slide back with every shot, giving a strong, snappy recoil impulse that makes target shooting genuinely fun. You get the realism of the slide cycling with the precision of pellet shooting — the best of both worlds.
Build Quality
Construction is a sensible polymer/metal mix: the frame is tough polymer that shrugs off knocks, while the slide and internals bring the metal weight that sells the blowback feel. The double/single action trigger is crisp, the manual safety is positive, and the drop-free style magazine is easy to load and change. Being a licensed Umarex Glock replica, everything lines up with aftermarket holsters too — a nice bonus if you like to store or transport it properly.
In the Box and Specifications
You get the pistol, the 21-round magazine, a CO2 installation tool, and the manual. Key specs:
- Calibre: .177 (4.5mm) pellet
- Power: 12g CO2
- Energy: 3J / approx. 394 FPS
- Magazine: 21 rounds, chain-fed
- Action: semi-auto, double/single, blowback
- Construction: polymer / metal
- Length: 202mm; Weight: 830g
- Safety: manual; 1:1 scale licensed replica
Who Is It For?
This is a pistol for the target and plinking shooter who wants realism and accuracy in one package. If you enjoy precise shot placement and a satisfying recoil cycle, the pellet-fed Gen5 is the Glock to choose. As with all airguns sold by Just Air Guns, sales are strictly to persons aged 18 and over in line with the VCR Act 2006, and this pistol is intended for safe target shooting on private land or at a range.
Verdict
The Glock 17 Gen5 CO2 Pellet Air Pistol with Blowback is, in our opinion, the best Glock in the air pistol line-up: licensed looks, real blowback, and pellet accuracy that BB versions simply cannot match. At £214.99 it is a premium air pistol, but the build and shooting experience justify every penny. Check it out on the product page, or browse the full range in our air pistols category.
Buy the Glock 17 Gen5 CO2 Pellet Air Pistol with Blowback here