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[ARCHIVED THREAD] - Question about AR Kit Options for Uppers

Posted: 5/25/2004 5:38:19 PM EDT

What the heck is the difference between the following:

A2 upper
A3 upper
A3 upper with gas block sight base
any other subtle, but important differences in upper kits?

Wish the various sites would show pics of what is what for those of us who are new to the AR and want to build rather than buy.

Thanks

Pics would be best, but links will also help me a great deal

Posted: 5/25/2004 9:46:17 PM EDT

[#1]

At one time I wished they had a diagram like that too. It can be very confusing when you first start out learning about AR's. A2's have the carry handle and A3's are the flat top model.

Posted: 5/25/2004 11:37:53 PM EDT

[#2]

a3 upper with gas block sight base

Posted: 5/26/2004 11:01:35 AM EDT

[#3]

Thanks so far, what about the gas blocks/front sight options??

Some say picatinny gas block, some say forged front sight, etc.

Posted: 5/26/2004 1:07:55 PM EDT

[#4]

Quoted:
Thanks so far, what about the gas blocks/front sight options??

Some say picatinny gas block, some say forged front sight, etc.

Brandon's last picture shows the picatinny gas block. Standard 'triangle" front sight bases come either cast or forged.

Posted: 5/26/2004 7:28:58 PM EDT

[#5]

standard forged front sight

Posted: 5/27/2004 12:34:54 PM EDT

[#6]

and to further confuse you, some manufacturers call a flat top an A4.

[ARCHIVED THREAD] - Question about AR Kit Options for Uppers

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