Maruzen M870 Black Version: specs, joules & FPS

Complete specs Maruzen Gas NBB (non-blowback)

Maruzen M870 Black Version, NBB: 0.45 J, 220 FPS, 2,550 g, 4 rounds. Full specs from the official source, with FPS for every BB weight.

Power

Energy · computed0.45 J
Velocity220 FPS67 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

BrandMaruzen
ModelM870 Black Version
CategoryShotguns
Power sourceGas NBB (non-blowback)
PlatformM870
Weight2,550 g
Length927 mm
Magazine4 rounds
Hop-upFixed

Weighs 2,550 g: lighter than 50% of NBB replicas in the same category in the database (12 with weight).

Similar alternatives

Same type and category, with similar power and weight.

ReplicaEnergyFPSWeight
Maruzen M870 Wood Stock Version0.45 J2202,550 g
Maruzen M870 Extension Custom Black Version0.45 J2202,600 g
Maruzen M870 Extension Custom Wood Stock Version0.45 J2202,600 g
Tokyo Marui M870 Wood Stock Type0.58 J2502,660 g
Tokyo Marui M870 Tactical0.58 J2502,680 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 g22067
0.25 g19760
0.28 g18657
0.30 g18055
0.32 g17453
0.36 g16450
0.40 g15647

Theoretical calculation at constant energy (0.45 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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