AR-15 Enhanced Trigger Guard

Enhanced trigger guard for AR-15 lower receiver. If you use Design Spark Mechanical for your CAD software you can use the native models (.rsdoc) to remix this into one of your own.

8/13/2017: V3.2
Narrowed the fwd/aft tabs from 11mm to 10.6mm because the fit was too snug.
Rounded off the upper edges