Tactical Dads Airsoft gives opinion on the Nuprol Delta  Pioneer Defender AEG, if it is the best budget AEG under £150. The Nuprol Delta Pioneer Defender M4 is a value AEG with a picatinny rail, a birdcage flash hider, a detachable rear sight and a 6 position stock. It has a 6.03mm Aluminium Tightbore Barrel, a quick change spring system, a full steel toothed piston, and a reinforced nylon fibre receiver, flash hider, rail, outer barrel and stock tube.