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This is a modified A3 UR Lite upper that has no deflector, dust cover, gas tube hole, or forward assist that has been reinforced at the front. This upper is meant to use a press fit and glued barrel nut for a proprietary printed barrel.
This pack includes a prototype 22lr barrel that is 4" OAL.
This upper is not intended for centerfire munitions, and must be assembled with a CMMG 22LR conversion and barrel liner.
Use a 1/4" drill bit to chamber the end of the barrel liner for the CMMG 22lr drop in 5.56 conversion kit. Print this receiver vertically standing on the barrel end for best quality. Ensure proper scaling so the cmmg charging handle fits. If the charging handle is stiff it will break the end off instead of going forward with the bolt when released.
The free float barrel nut is 1.75" OD and is intended to fit PVC pipe or Fiberglass tube as a handguard with 1/4-20 bolts to hold the handguard on, and shorter 1/4-20 bolts to hold the barrel nut on to the upper. Ensure a snug fit. Improper fit could result in the handguard coming forward and placing your hand in front of the barrel.
LBRY Tags: 22lr; ar15; upper; 3d print; stubbs
This pack includes a prototype 22lr barrel that is 4" OAL.
This upper is not intended for centerfire munitions, and must be assembled with a CMMG 22LR conversion and barrel liner.
Use a 1/4" drill bit to chamber the end of the barrel liner for the CMMG 22lr drop in 5.56 conversion kit. Print this receiver vertically standing on the barrel end for best quality. Ensure proper scaling so the cmmg charging handle fits. If the charging handle is stiff it will break the end off instead of going forward with the bolt when released.
The free float barrel nut is 1.75" OD and is intended to fit PVC pipe or Fiberglass tube as a handguard with 1/4-20 bolts to hold the handguard on, and shorter 1/4-20 bolts to hold the barrel nut on to the upper. Ensure a snug fit. Improper fit could result in the handguard coming forward and placing your hand in front of the barrel.
LBRY Tags: 22lr; ar15; upper; 3d print; stubbs