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Posted: 7/23/2003 7:16:25 PM EDT
I think my next project is going to be a 9mm short barreled rifle, but have a question.
If I buy a complete upper, will all the standard 5.56mm parts work in the lower? I know about adding a mag block, but what about the trigger, hammer, etc.? Where do I get the mags?


Thanks in advance....
Link Posted: 7/23/2003 7:25:19 PM EDT
It's all discussed many time over in the "Rimfire/Pistol caliber" section. Variables as to who's system you choose... Oly or Colt pattern (RRA/ASA). Oly,,, run what you brung...Colt pattern, M16 hammer if M16, M16 hammer with lug cut off or 9mm semi hammer for semi auto operation, or ramp the Colt pattern bolt and use any hammer...
Link Posted: 7/23/2003 11:39:07 PM EDT
A Colt 635 runs with regular M16 FCG. Why couldn’t a Colt 9mm Sporter run with AR FCG parts? I know the 9mm semi has different parts, just wondering why. Best Regards, J
Link Posted: 7/23/2003 11:49:23 PM EDT
Originally Posted By JTR8541: A Colt 635 runs with regular M16 FCG. Why couldn’t a Colt 9mm Sporter run with AR FCG parts? I know the 9mm semi has different parts, just wondering why. Best Regards, J
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Most standard semi-auto AR hammers have that "hook" on their face. That'll get hung up on the bottom of the bolt, and jam everything up nice and tight. The M16 hammer doesn't have that, which is why the suggestion to use it, with the lug cut off.
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