I am building an AR15. Just started really; I have my lower and a flat top upper and that's it so far. I've been shopping around a lot and I know that I want a 16" barrel probably a standard heavy barrel (don't have any burning desire for a M4 contour barrel because I don't forsee the need for a grenade launcher but I'm not rabidly against it either) with gas block front sight, free float handguards, red-dot type optic, flip-up sights (they will probably have to wait), and probably a six-position stock.
I am relatively unfamiliar with the finer points of the AR as I have never been a huge fan of the weapon. I need to know the difference between an M4 extension and a Standard extension in reference to the barrel.
The other issue I have is the length of the gas system. I understand the difference between the carbine and mid-length systems and that the mid-length would produce less wear. But when I am looking at barrels online I don't see where it is specified carbine, mid or rifle length. Surely there must be a difference in were the hole is drilled if you can have either carbine or midlength in a 16" barrel. Or am I mistaken and is midlength not available in a 16" barrel.
Please help, O Great AR Gurus out there. (And remember, I'm a cop so I'm broke; $1500 weapon systems don't do me any good)
I am relatively unfamiliar with the finer points of the AR as I have never been a huge fan of the weapon. I need to know the difference between an M4 extension and a Standard extension in reference to the barrel.
The other issue I have is the length of the gas system. I understand the difference between the carbine and mid-length systems and that the mid-length would produce less wear. But when I am looking at barrels online I don't see where it is specified carbine, mid or rifle length. Surely there must be a difference in were the hole is drilled if you can have either carbine or midlength in a 16" barrel. Or am I mistaken and is midlength not available in a 16" barrel.
Please help, O Great AR Gurus out there. (And remember, I'm a cop so I'm broke; $1500 weapon systems don't do me any good)