G&P GBB Short Railed Handguard with SAI QD System for WA M4A1 Series Airsoft AEG Shooting Mode: Semi-Auto

Shooting Mode: Semi-Auto

But definitely not the APM40A3 style

The action is locked by tipping the rear of the bolt (breechblock) upwards

Military Type Airsoft Grenade Launcher for Under barrel or standalone use  Able to accommodate 8

G&P GBB Short Railed Handguard with SAI QD System for WA M4A1 Series Airsoft AEG Shooting Mode: Semi-AutoThe G&P GBB Short Railed Handguard with SAI QD System for WA M4A1 Series is a truely unique design that provides a sleek, stylish and functional design for M4 AR 15 M16 GBB series users. M lok slots are found on the side for attaching accessories. At the front is a detachable flash hider cage that was designed to contain all the muzzle flashes.