request for Glock 21 information

[casca1]

greeting,
just picked up an Auctionarms Glock 21  for $ 427 one 13rd mag.
 
How can I tell what generation it is  ?  this one has the flash light rail under the Muzzle.
 
Last one that I owned I sent to Glock-GA.  to have them go through and do all updates and needed maintenance.
It went to the sand box and has been passed around to several different military users over last 8 years.
 
this one I want to keep for myself
 
tell me where to best place to pick up some o/s slide stop & mag release and perhaps different barrel for cast.
 
But lastly,  when man one day walks on other planets He will carry the M1911A1 to really kick some ass
thanx
 CASCA1
 
 

[R.W.Dale]

If it has a rail and no interchangeable back straps its a Gen III

I got nothing on bbls or where to buy one beyond I shoot cast all the time in my 34, you just need to shoot a suitably hard bullet fast enough to get it to obturate and stay aware that you can't shoot hundreds of cast bullets between cleanings

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[slickest]

thanks for the info guys.