Umarex Beretta PMX SMG GBB (by KWA): specs, joules & FPS

Complete specs Umarex GBB (gas blowback)

Umarex Beretta PMX SMG GBB (by KWA): 0.95 J, 320 FPS, 2,400 g, 48 rounds. Full specs from the official source, with FPS for every BB weight.

Power

Energy · computed0.95 J
Velocity320 FPS98 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
ModelBeretta PMX SMG GBB (by KWA)
CategorySMGs
Power sourceGBB (gas blowback)
PlatformPMX
Weight2,400 g
Length637 mm
Magazine48 rounds
Hop-upAdjustable

Weighs 2,400 g: heavier than 58% of GBB replicas in the same category in the database (67 with weight).

At 0.95 J it is more powerful than 43% of GBB replicas in the same category that stay within 1 J (21).

Similar alternatives

Same type and category, with similar power and weight.

ReplicaEnergyFPSWeight
G&G SMC-91.01 J3302,150 g
VFC Umarex HK MP5K1 J3282,350 g
VFC Umarex HK MP5K Early Model1 J3282,350 g
Umarex MP5K Early Type Gen 2 GBB SMG (by VFC)1.01 J3302,340 g
Krytac KRISS Vector SMG GBB1.04 J3352,300 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 g32098
0.25 g28687
0.28 g27082
0.30 g26180
0.32 g25377
0.36 g23973
0.40 g22669

Theoretical calculation at constant energy (0.95 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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