Umarex USP Compact GBB (Black) (by KWA): specs, joules & FPS

Complete specs Umarex GBB (gas blowback)

Umarex USP Compact GBB (Black) (by KWA): 0.84 J, 300 FPS, 730 g, 22 rounds. Full specs from the official source, with FPS for every BB weight.

Power

Energy · computed0.84 J
Velocity300 FPS91 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
ModelUSP Compact GBB (Black) (by KWA)
CategoryPistols
Power sourceGBB (gas blowback)
PlatformUSP
Weight730 g
Length171 mm
Magazine22 rounds
Hop-upAdjustable

Weighs 730 g: lighter than 71% of GBB replicas in the same category in the database (466 with weight).

At 0.84 J it is more powerful than 49% 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 GTP 90.84 J300770 g
VFC SA 226T0.81 J295765 g
ICS BLE-ICP0.84 J300805 g
VFC SA 3200.81 J295675 g
KSC USP Compact (ABS Version, Japan Market Version)0.75 J285710 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 g30091
0.25 g26882
0.28 g25477
0.30 g24575
0.32 g23772
0.36 g22468
0.40 g21265

Theoretical calculation at constant energy (0.84 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.

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