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Picture of Citadel
posted
Buddy has a A2 HBAR, would like to make it into a flat top. Any recommendations?
 
Posts: 872 | Registered: February 20, 2003Reply With QuoteReport This Post
Peace through
superior firepower
Picture of parabellum
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A Colt upper? I wouldn't change a thing, but you would have to separate the barrel from the upper receiver, then remount the barrel and gas tube on a new flat top receiver. Probably more trouble than it's worth.
 
Posts: 111820 | Registered: January 20, 2000Reply With QuoteReport This Post
Age Quod Agis
Picture of ArtieS
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Keep that upper the way it is. Just buy a new upper.



"I vowed to myself to fight against evil more completely and more wholeheartedly than I ever did before. . . . That’s the only way to pay back part of that vast debt, to live up to and try to fulfill that tremendous obligation."

Alfred Hornik, Sunday, December 2, 1945 to his family, on his continuing duty to others for surviving WW II.
 
Posts: 13237 | Location: Central Florida | Registered: November 02, 2008Reply With QuoteReport This Post
Hop head
Picture of lyman
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quote:
Originally posted by ArtieS:
Keep that upper the way it is. Just buy a new upper.


this is the way



https://chandlersfirearms.com/chesterfield-armament/
 
Posts: 10834 | Location: Beach VA,not VA Beach | Registered: July 17, 2007Reply With QuoteReport This Post
Fighting the good fight
Picture of RogueJSK
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Yep. Get a new upper assembly.

If he doesn't want the A2 HBAR upper at all any more, he could sell it to cover some/all of the cost of the new upper.
 
Posts: 34185 | Location: Northwest Arkansas | Registered: January 06, 2008Reply With QuoteReport This Post
I have not yet begun
to procrastinate
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Your buddy can get an AR Stoner upper for for $250 from Midway.
Keep the original upper as is.

LINK
1 in 8 twist, 223 Wylde chamber, A2 flash hider, complete upper.


--------
After the game, the King and the pawn go into the same box.
 
Posts: 3979 | Location: Central AZ | Registered: October 26, 2006Reply With QuoteReport This Post
Raptorman
Picture of Mars_Attacks
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Yeah, just buy a complete upper.

I only do swaps the other way around.


____________________________

Eeewwww, don't touch it!
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Posts: 34922 | Location: North, GA | Registered: October 09, 2002Reply With QuoteReport This Post
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This appears to non Colt people easier than it looks. Colt in my memory only offered a few HBAR true `1/7 uppers about 20+ years ago. The issue you have is you can find HBAR A2 rifles and current uppers. The current uppers are cut with M4 feed ramps where the barrels are not. Non compatible!! In my opinion this is easier with aftermarket parts (non Colt). If not you will need to find an older flat top upper without M4 feed ramps from a older sporter blue label gun.
 
Posts: 8 | Location: Houston, Texas | Registered: December 03, 2011Reply With QuoteReport This Post
Raptorman
Picture of Mars_Attacks
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Just buy a non M4 rifle receiver. They are universal donors.


____________________________

Eeewwww, don't touch it!
Here, poke at it with this stick.
 
Posts: 34922 | Location: North, GA | Registered: October 09, 2002Reply With QuoteReport This Post
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Picture of Expert308
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If you do decide to put a different (flat top) upper on the rifle, check the takedown pin first. My Colt A2 HBAR, which I no longer own, had the oversized takedown pin which is bigger in diameter than the "standard" takedown push-pin. You used to be able to buy an adapter for a few bucks that would let you mate a small-pin upper with the Colt big-pin lower, but I don't know if those are still available.
 
Posts: 7669 | Location: Idaho | Registered: February 12, 2007Reply With QuoteReport This Post
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