questions on caliber changes

Discussion in 'Gunsmithing Forum' started by hh09, Mar 7, 2014.

  1. hh09

    hh09 New Member

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    Hey guys I'm new to owning a semi auto rifle and i have a few questions on upgrading and modifying. I recently got a dsa zm4 lower receiver with a .22 lr cmmg upper, i am looking into buying a new complete upper and making this gun a 5.56. Is there a conversion kit i would have to get for this and if anyone has opinoins on best upper receivers for the money i would like to here it.
     
  2. danf_fl

    danf_fl Retired Supporter

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  3. jjfuller1

    jjfuller1 New Member

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    the only change is the upper, the mags, and the ammo.