KWA Lithgow Arms F90 GBB: specs, joules & FPS

Complete specs KWA GBB (gas blowback)

KWA Lithgow Arms F90 GBB: 1.34 J, 380 FPS, 3,630 g, 30 rounds. Full specs from the official source, with FPS for every BB weight.

Power

Energy · computed1.34 J
Velocity380 FPS116 m/s

Above Italy's 1 J limit

Italian shops sell versions tuned below 1 J: ask the shop which version they ship.

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

BrandKWA
ModelLithgow Arms F90 GBB
CategoryAssault rifles & carbines
Power sourceGBB (gas blowback)
PlatformAUG
Weight3,630 g
Length800 mm
Magazine30 rounds
Hop-upAdjustable

Weighs 3,630 g: heavier than 90% of GBB replicas in the same category in the database (314 with weight).

Similar alternatives

Replicas of the same type and category that stay within the Italian 1 J limit.

ReplicaEnergyFPSWeight
VFC HK53 GBB1 J3283,200 g
Tokyo Marui CQBR Block 1 GBB0.95 J3203,110 g
Tokyo Marui M4A1 MWS0.95 J3202,970 g
Novritsch SSQ22 Gen2 GBB1 J3281,800 g
Tokyo Marui Type 89 J.G.S.D.F. GBBR (ZET System)0.73 J2803,640 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 g380116
0.25 g340104
0.28 g32198
0.30 g31095
0.32 g30092
0.36 g28386
0.40 g26982

Theoretical calculation at constant energy (1.34 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 KWA replicas