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Airsoft GBB M4 120% Hammer Spring

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Airsoft 120% M4 GBB Hammer Spring

Quick Overview

Upgrade gas blowback M4 or M16 hammer spring

In stock



The GBB M4 120% Hammer Spring is an upgraded spring for gas blowback AR15 airsoft guns.

This spring fits most GBBR M4s, and increases velocity by increasing gas released behind the BB. The 120% hammer spring will produce different results depending on what other components it is paired with and what rifles it is installed in.

GBB M4 120% Hammer Spring Features:

-Fits most GBB M4 Airsoft Guns
-Improves Velocity 

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