Silent Industries AEG M4 Alpha Hop-Up Chamber AKS74MN This means the consistent output

This means the consistent output of a solenoid without the complexity and battery drain of an FCU

The M4 magwell on the adapter is adjustable to enable use of practically any M4 magazine on the market and make it fit perfectly without any wobble

Gold Cup Series 9mm /

Transparent polymer lets you check how many BBs you have left without taking the magazine out of the rifle

two position retractable stock

Silent Industries AEG M4 Alpha Hop-Up Chamber AKS74MN This means the consistent outputLET US SHOW YOU THE MOST FEATURE PACKED AEG HOP UP EVER MADE! TRUE TDC To get the most consistent pressure on the bucking through the hop up settings, we had to include TDC. This means the nub can only move in up & down motion. The TDC trolley we include is made for nubs, so you can use your desired nub. We recommend using our Black Nubs, Blue Nubs, ML Omega or similar height nubs, because our system was optimised for it. Our TDC system provides the