Stubby Killer Shorty Type CQB Fix Stock for M4 / M16 Series Airsoft AEG (Color: Black) The Stubby Killer CQB stock is a M16 style stock that is shorter than normal, providing you a compact platform while retaining its ability to house a large capacity battery. The Stubby killer stock will house almost all LiPo batteries and for NiMh users the 9.6V 2300mah nun-chuck fits like a charm! Features: Fits most M4 / M16 Series Airsoft AEG Rifles Compact Stock with Easy Battery Installation! Provides a Unique Appearance Compatibility: For Tokyo Marui, G&P, Matrix and other compatible M4 / M16 Series Airsoft AEG Rifles Material: Nylon Polymer