440 FPS Airsoft DBoys Full Metal M4 CQB-SD AEG Rifle w/ Reinforced 7mm Gearbox - Enhanced Production Run Model with Battery Charger Package
The Boyi D-Boys M4 SD features a free floating quad rail. The gun includes a silencer that is threaded onto the barrel which actually begins within the rail. It features a crane stock for the battery, and also an LMT Style tactical rear sight.