Maxx Model AEG Steel Cylinder Li-Ion Battery The HK MP5 Competition SD6

The HK MP5 Competition SD6 AEG

The PTS Battlecomp Flash Hider Compensator (CCW) fits on all airsoft CCW 14mm threaded barrels

Glow in the dark RED color airsoft BBs

This goes a long way to actively reduce mental and physical fatigue

Maxx Model AEG Steel Cylinder Li-Ion Battery The HK MP5 Competition SD6The Maxx Model AEG Steel Cylinder. Made of hardened stainless steel in a variety of AEG styles. Precision made it's probably the nicest aftermarket cylinder series we've ever seen. For a variety of different barrel lengths vented holes per each length (see drop down menu). Most M4 guns are the 300 400mm barrel style. Fits in all gearboxes pick which approximate barrel length you have for optimal performance.