Umarex Glock 42 GBB (VFC G42): specs, joules & FPS

Complete specs Umarex GBB (gas blowback)

Umarex Glock 42 GBB (VFC G42): 0.73 J, 280 FPS, 430 g, 10 rounds. Full specs from the official source, with FPS for every BB weight.

Power

Energy · computed0.73 J
Velocity280 FPS85 m/s

Within Italy's 1 J limit

Energy computed from the velocity with 0.20 g BBs, the standard weight manufacturers and shops use to measure FPS.

For information only, based on the source's data for this version. Not legal advice: always check current local law and the version the shop sells.

Technical specifications

BrandUmarex
ModelGlock 42 GBB (VFC G42)
CategoryPistols
Power sourceGBB (gas blowback)
PlatformG SERIES
Weight430 g
Length155 mm
Magazine10 rounds
Hop-upAdjustable

Weighs 430 g: lighter than 97% of GBB replicas in the same category in the database (466 with weight).

At 0.73 J it is more powerful than 14% of GBB replicas in the same category that stay within 1 J (351).

Similar alternatives

Same type and category, with similar power and weight.

ReplicaEnergyFPSWeight
G&G Piranha MK1 GBB0.84 J300450 g
G&G Piranha SL GBB0.84 J300450 g
G&G GTP9 MS GBB0.84 J300460 g
G&G GTP9 Rose Gold GBB0.84 J300460 g
G&G Piranha TR GBB0.84 J300470 g

Velocity with different BB weights

At the same energy, heavier BBs leave the barrel slower. Expected velocity with the most common weights:

BB weightFPSm/s
0.20 g28085
0.25 g25076
0.28 g23772
0.30 g22970
0.32 g22167
0.36 g20964
0.40 g19860

Theoretical calculation at constant energy (0.73 J). Real-world values can differ slightly with hop-up and replica.

Try other values in the joule ↔ FPS converter →

Data source

The values on this page come from the product page of the shop redwolfairsoft.com, checked on 2026-11-07. The manufacturer does not publish full specs: values may refer to the version that shop sells.

Shop product page ↗ redwolfairsoft.com

Spotted a wrong or missing value? Let us know.

More Umarex replicas