G45 80 percent AR45 blow back lower receiver.
Caliber: Multi (will accept 45, and other large frame caliber upper receiver)
Magazine: Accepts any Glock style large frame magazine.
Provided with ejector and billet aluminum magazine catch..
These are AR 15 receivers. All mil-spec fire control parts will fit.
Please Note... This is a Blow Back receiver not for Direct Impingement.
This is a 80 Percent lower receiver, NO FFL required as it is not considered to be a firearm.
Link to video of a G45 Blow Back full auto receiver