Its a rebranded AGM M14 which is(TSD is Team SD which imports alot of guns to the US, they are like UTG, which ironically is still an AGM)... well, ok... When my friend got his AGM m14 i was impressed with what you get, but overall it doesnt feel as good as a TM one but thats what you get for a fractino of the price.
You might want to change the Hop Up unit with a TM M14 Hop Up unit because the one on the AGM's and rebrands are pretty knaff, they dont adjust well and can move during firing. As far as internals go the AGM uses V2 (YES YOU READ THAT RIGHT) V2 inner parts not V7 like the TM M14, which is a bonus for people looking to upgrade. I think that excludes the Cylinder and Cylinder head but everything else is V2. It does take TM Compatable mags so finding mags is easy. The battery is also pretty patoote. Go buy one and to tell me if the charger that comes with it is a US charger or foreign (You can tell by the pins on the charger) The AGM one comes with a slight problem that the wiring needs to be reversed so that you can use regular batteries...
My recommendation is to buy a gun that is more trustworthy simply because these "clones" arnt as new user friendly as the companies, that make them, wish they were. If this is a "Project gun" then by all means buy it, but if your a newer player I'd consider getting something more reliable...
my $.02