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this is a step file with 4 variations of the Chonky Boi receiver.
two fit mil spec uppers and 2 fit bear creek arsenal side charging uppers. some have a spot for a 1/4" 6-32 set screw if you want to make a selector stop so that you don't accidentally go third position on a fudd range.
there is a slot on top where you can drop in a dog tag if you want to serialize your lower, just slide the plug in on top afterwards and use a soldering iron to plastic weld the seam shut.
to assemble the lower you need the following:
-4x 2" 6-32 socket head screws (two cut to 1.75" inserted in the bottom 2 holes) (inserted through the back to strengthen the receiver extension)
-1x 1" 6-32 socket head screw (for reinforcing the pistol grip)
-1x 5/8" 8-32 socket head screw and 8-32 square nut (the nut is inserted in back, and the screw comes through the bottom to keep the buffer tube from turning)
-1x 1" 1/4 od screw post (to hold the pistol grip in place)
-2x 2" 1/4 od screw posts (to act as pivot and take down pins)
-1x 1.5" 3-36 socket head screw (to hold the bolt hold open in place)
-1x mil spec mag release
-1x mil spec bolt hold open
-1x mil spec carbine buffer tube
-1x ar15 FCG
two fit mil spec uppers and 2 fit bear creek arsenal side charging uppers. some have a spot for a 1/4" 6-32 set screw if you want to make a selector stop so that you don't accidentally go third position on a fudd range.
there is a slot on top where you can drop in a dog tag if you want to serialize your lower, just slide the plug in on top afterwards and use a soldering iron to plastic weld the seam shut.
to assemble the lower you need the following:
-4x 2" 6-32 socket head screws (two cut to 1.75" inserted in the bottom 2 holes) (inserted through the back to strengthen the receiver extension)
-1x 1" 6-32 socket head screw (for reinforcing the pistol grip)
-1x 5/8" 8-32 socket head screw and 8-32 square nut (the nut is inserted in back, and the screw comes through the bottom to keep the buffer tube from turning)
-1x 1" 1/4 od screw post (to hold the pistol grip in place)
-2x 2" 1/4 od screw posts (to act as pivot and take down pins)
-1x 1.5" 3-36 socket head screw (to hold the bolt hold open in place)
-1x mil spec mag release
-1x mil spec bolt hold open
-1x mil spec carbine buffer tube
-1x ar15 FCG