Northeast STEN MK5 GBB: specs, joules & FPS

Complete specs Northeast GBB (gas blowback)

Northeast STEN MK5 GBB: 1.27 J, 370 FPS, 2,530 g, 32 rounds. Full specs from the official source, with FPS for every BB weight.

Power

Energy · computed1.27 J
Velocity370 FPS113 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

BrandNortheast
ModelSTEN MK5 GBB
CategorySMGs
Power sourceGBB (gas blowback)
PlatformWW1 & WW2
Weight2,530 g
Length495 mm
Magazine32 rounds
Hop-upAdjustable

Weighs 2,530 g: heavier than 61% of GBB replicas in the same category in the database (67 with weight).

Similar alternatives

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

ReplicaEnergyFPSWeight
VFC Umarex HK MP5K1 J3282,350 g
VFC Umarex HK MP5K Early Model1 J3282,350 g
Umarex Beretta PMX SMG GBB (by KWA)0.95 J3202,400 g
VFC MP5 A5 V2 GBBR1 J3282,830 g
VFC MP5 K-PDW GBBR1 J3283,120 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 g370113
0.25 g331101
0.28 g31395
0.30 g30292
0.32 g29389
0.36 g27684
0.40 g26280

Theoretical calculation at constant energy (1.27 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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