Just got done putting this together and put about 60 rounds through it getting the sights on target. Upper is a very lightly use C MP marked Colt A2 HBAR 1/7 5.56 upper. All Colt save for the BCG which is AO precision the white label OEM for FN Military Contract Rifles. Lower is a pocket cut low shelf Centurion Arms CM4 with an A2 grip, CMMG A1 stock and a Milspec trigger with a maritime bolt catch. Lower is a great host for a SS or FRT and with the HBAR barrel she’s ready fir the abuse. I found an old School Fire Force CQB sling and threw that on there as well, comes with one USGI surplus mag.
