Umarex Glock G19X MOS GBB Review: A Crossover Sidearm Worth £196?

The real-steel Glock G19X was Glock’s crossover answer to the US Army trials — a full-size G17 frame mated to a more concealable G19 slide, all wrapped in coyote tan. As a sidearm it splits the difference between duty pistol and carry gun, and that same logic makes the airsoft version an interesting backup choice. We got hands on the Umarex Glock G19X MOS, built under licence by SRC, to see whether the crossover idea holds up on a UK skirmish field.

Out of the Box

The G19X arrives in Glock’s familiar boxed presentation with one gas magazine, and the first thing you notice is the colour — the full coyote-tan polymer frame is a genuine talking point on a loadout dominated by black sidearms. In the hand it carries the slightly nose-heavy balance of the real G19X thanks to the longer grip, and the licensed Glock trademarks and slide markings are crisp. The MOS (Modular Optic System) cut is the headline feature here: the slide is pre-machined to accept a micro red dot, so this is a pistol bought with an optic in mind.

Gas Efficiency & Blowback Feel

This is a green-gas blowback pistol, and on a warm day the cycle is snappy with a positive slide return — exactly what you want when you’re dumping rounds in a phone-booth CQB exchange. We’d treat cold-weather performance with the usual caution every green-gas GBB demands; in British winter conditions a sidearm like this is a fair-weather friend unless you keep mags warm. We won’t quote a shots-per-fill figure we haven’t bench-tested, but the full-size magazine gives a sensible round count for a backup role before you’re reaching for a top-up.

Accuracy & Hop-Up

The hop-up follows the standard G17-pattern adjustment under the slide, and for a sidearm the priority is consistency at backup-engagement distances rather than DMR reach. On 0.20g–0.25g BBs a pistol in this class is built to put rounds on a torso out to typical CQB ranges; we’d run 0.25g for a touch more stability in the indoor airflow you get at most UK arenas.

UK Site Compliance

As a realistic imitation firearm this G19X needs a UKARA-registered purchase or a recognised defence under the VCRA — if you’re reading our blog you’ll already know the drill. It’s strictly 18+, and most CQB sites cap sidearms at 328 FPS / 1.0J, which a stock green-gas GBB of this type sits comfortably under. A two-tone option exists for buyers without a defence. Always chrono on arrival and respect your site’s pistol-specific rules.

Final Thoughts

The Umarex Glock G19X MOS is a sidearm with a clear identity: a licensed, optic-ready crossover Glock in a colourway that actually stands out, pitched at the milsim or skirmish player who wants a credible backup rather than a budget afterthought. Pair it with a micro red dot to use that MOS cut and you’ve got a genuinely capable secondary. If that’s your kind of sidearm, you can buy the Umarex Glock G19X MOS pistol at Airsoftdirect — in stock now with fast UK dispatch.