Although named like the real steel Colt AR-15A2, this G&P AEG actually replicates the Colt AR-15A2 HBAR Sporter as it has the full 20 inch M16 barrel instead of the AR-15A2s 16 inch carbine length barrel. Otherwise the differences in the real steel version are inconsequential to the Airsoft model (barrel twist rate, heavier barrel, etc) and for all intensive purposes this is a G&P M16 in this instance targeting the cheaper end of the scale as an entry level but high quality long barrel AEG.
As a base model M16, is has the original receiver (metal) with integrated carry handle and full M16A2 style adjustable two-position rear sight with fixed front post. The full length solids tock allows the use of a large type NiCad battery and the long handguard is basic polymer style keeping the weight reasonable.
The magazine is a mid cap 130 round capacity type STANAG thus giving you a fair capacity with no need to wind. G&P type magazine means that this weapon is compatible with Tokyo Marui and King Arms M16 magazines as well which makes it one of the easiest weapons to buy magazines for. Rear and front sling mounts and a bayonet lug and capable of both semi auto and full auto fire this really is the base military style weapon.
Clocking in at a respectable 360 fps, it shoots clean and stable at that level making it good for decent out door range. G&P quite literally is the benchmark standard for version 2 gearbox type M16s so while this weapon makes a very fine basic entry model AR for general gaming it has a massive potential for modifications and upgrades inside and out. Over time, this weapon can be modified with so many staggering options that you really can build up a truly personalized AR type AEG.