An M16A1 and its variants, the XM177E1 and XM177E2 I made for the project Squad: Vietnam.
3D inspection of the XM177E1 is not included because it is more or less the same as the XM177E2, but with a little derivation.
Fitted with 20 round mags, The M16A1 was the workhorse of the U.S. Military in the 1960s, notably the Vietnam war.
M16A1 Sketchfab
XM177E2 Sketchfab