Umarex Glock G42 GBB Review: The Smallest Glock as an Airsoft Backup?

Most airsoft sidearms chase the duty-pistol crowd — full-size frames, 20-plus round mags, the works. The Umarex Glock G42 goes the other way. Built by VFC, it replicates Glock’s slimline single-stack subcompact, the smallest pistol the company makes. That makes it an unusual choice on the field, and a deliberate one: this is a deep-concealment, last-ditch backup or a collector’s piece, not a speedsoft primary. We took a look at what the little G42 brings to a UK loadout.

Out of the Box

The G42 ships in Glock packaging with a single gas magazine, finished in straightforward black. What strikes you immediately is the scale — this is a genuinely small pistol, and VFC have kept the proportions honest, so it sits in the hand exactly as the real subcompact does. The licensed Glock markings are clean and the polymer frame has the correct stippled texture. It’s a pistol that rewards players who appreciate true-to-scale replication over spec-sheet bragging rights.

Gas Efficiency & Blowback Feel

This is a green-gas blowback pistol, and the smaller slide mass gives a brisk, lively cycle. The trade-off with any subcompact GBB is gas volume — a smaller magazine holds less gas and fewer BBs than a full-size sidearm, so expect a shorter string before a top-up, and treat it as a warm-weather companion like any green-gas pistol in the UK climate. We won’t put a number on shots-per-fill without bench-testing it, but manage your expectations: the G42 is about handling and realism, not endurance.

Accuracy & Hop-Up

The hop-up uses the familiar G17-pattern adjustment, and the short barrel keeps this firmly in close-quarters territory. Run 0.20g–0.25g BBs and treat it as a backup-distance tool — you’re putting rounds on a target at room-clearing ranges, not reaching across a woodland lane. Within that envelope it does the job.

UK Site Compliance

As a realistic imitation firearm the G42 requires a UKARA-registered purchase or a valid VCRA defence, and it’s 18+ only. As a backup sidearm it sits well under the 328 FPS / 1.0J cap most CQB sites apply to pistols. A two-tone version is available for buyers without a defence. Chrono on arrival and follow your site’s secondary-weapon rules.

Final Thoughts

The Umarex Glock G42 won’t be everyone’s pick — it’s small, the gas capacity is modest, and it’s built for a niche. But for the milsim player who wants a credible concealed backup, or the Glock collector who wants the full range on the shelf, the VFC build quality and faithful subcompact scale make it a charming little sidearm. If that speaks to you, you can buy the Umarex Glock G42 pistol at Airsoftdirect — in stock now with fast UK delivery.