ML Hummingbird Short-Stroke Bolt Assembly for GHK M4 GBB – Silver

CNC Aluminum Bolt for GHK M4
This bolt by Maple Leaf ensures durability and reliability even under intense use. The short stroke system enables a faster firing cycle of up to 18 rounds per second, enhancing shooter efficiency during airsoft games, while still retaining the bolt catch functionality, which most short-stroke systems lack.With its capability to convert AR-15 rifles into folding stock configurations or tubeless setups, this bolt is ideal for CQB rifle variants. The upgraded NPAS valve (2023 plus ) and the new guide block ensure consistent performance and accuracy. Installation is easy as a drop-in replacement for the original part. The package also includes a reinforced nozzle designed specifically for high-speed firing.

Key Features

Complete short-stroke bolt systemIncreases the rate of fire up to 18 rounds per second.
FlexibilityCompatible with folding stock AR-15 configurations or tubeless setups.
CompatibilitySupports new and older generations of GHK M4 GBB, including models MK18, DD RIS II, and URGI.

Technical Specifications

Material: Aluminum alloy, nylon
Color: Silver
Weight: 195 g
Compatibility: GHK M4 / MK18 / DD RIS II / URGI (new and older generations)
Type: Short-stroke bolt
Performance: Adjustable, NPAS valve

Package Contents

CNC Aluminum Bolt GBB
Adjustable NPAS Valve
Nozzle