List all of the chambers you know of the AR15 platform to be built in. I have .223, 300BLK, 7.62x39 and my buddy also has .243 (using EXTRA light bullets) in his collection. I have also seen 9mm and of course the blow back conversion bolt to shoot .22 LR.Originally Posted by Nordic Bear
This is my latest M4 platform build. Chambered in 6.8spc... :0).....
Including your 6.8 that makes seven calibers...
Oh, I forgot, I sold all of mine yesterday at the gun show so I have none... I would love to get one to cycle properly with the conventional direct impingement set up in .17HMR...
Edit: Alexander Arms has a 17HMR upper but I dont know if it is a blowback bolt or if it uses D.I. gas action to cycle.
They also have a .50 Beowulf and 6.5 Grendel... Seems I recall someone making a custom lower to hold a .45ACP magazine so I looked that up and Olympic arms sells a barrel/kit for that...
That makes 11 calibers...
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06-23-2014, 06:55 PM #10Already miss the 310/562
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Last edited by 2manymustangs; 06-23-2014 at 07:15 PM.
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