2 ms·
http://www.ar15.com/forums/t_3_118/579913_3D_printed_lower___yes__it_works_.html http://www.ar15.com/forums/t_3_118/579913_3D_printed_lower__... Literally 10 s
by angersock 10y ago
http://www.ar15.com/forums/t_3_118/579913_3D_printed_lower___yes__it_works_.html http://www.ar15.com/forums/t_3_118/579913_3D_printed_lower__...
Literally 10 seconds on Google.