G&G GX45 MkV: specs, joules & FPS

Complete specs G&G GBB (gas blowback) Version for the Italian market

G&G GX45 MkV, GBB: 1 J, 328 FPS, 930 g, 26 rounds. Full specs from the official source, with FPS for every BB weight.

Power

Energy · computed1 J
Velocity328 FPS100 m/s

Exactly at Italy's 1 J limit

Energy computed from the declared velocity with 0.20 g BBs.

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

BrandG&G
ModelGX45 MkV
Manufacturer codeGAS-GPM-MKV-BBB-ECM
CategoryPistols
Power sourceGBB (gas blowback)
Platform1911
Weight930 g
Length220 mm
Inner barrel108 mm
Magazine26 rounds

velocità massima dichiarata per l'Italia (under 328 FPS / 100 m/s)

Weighs 930 g: heavier than 68% of GBB replicas in the same category in the database (466 with weight).

At 1 J it is more powerful than 96% 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
KJ Works Hi Capa GBB (KP-08)0.98 J325940 g
Novritsch SSP2 Gen2 GBB1 J–957 g
AW Custom NE30 1911 Iconic GBB1.01 J330960 g
AW Custom NE30 1911 Iconic GBB - 2 Tone1.01 J330960 g
Umarex H&K HK45 GBB - Black (by KWA)1.01 J330880 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 g328100
0.25 g29389
0.28 g27784
0.30 g26882
0.32 g25979
0.36 g24475
0.40 g23271

Theoretical calculation at constant energy (1 J). Real-world values can differ slightly with hop-up and replica.

Try other values in the joule ↔ FPS converter →

Data source

Every value on this page comes from the manufacturer's official product page, checked on 2026-11-07.

Official G&G product page ↗ guay2.com

Spotted a wrong or missing value? Let us know.

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