https://grabcad.com/library/improved...ogether-ar15-1

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James Stubbins
January 23rd, 2018

This version has all of my previous improvements, such as the deletion of the bolts that terminate inside the FCG, and the ability to accept a castle nut, as well as a newly modeled bolt catch. The dimensions for the reinforcements are based on the JT one piece lower within the FOSSCAD mega pack, as its the only one ive seen confirmed to work. I have yet to test this myself.

The specific parts proprietary to the bolt catch version are the left magwell side, the left reciever side, the rear magwell, and the right reciever side. The holes are slightly larger to use 6-32 bolts and I would reccomend these intsead of M3 due to the availability.