Take-off barrel and rails from a Colt LE6920 SOCOM mounted to a Spikes upper (used the original Colt upper and lower for a SOPMOD build). Spikes M4 upper, 7" Knights M4 Carbine RAS, Colt 16.1" M4 SOCOM profile barrel, front barrel side sling mount. Spikes upper had ~500 rounds through it before I installed the colt barrel assembly so it has some handling marks. Other than a test fire of 10 rounds when I installed the upper on the barrel assembly it's brand new.
Discrete Paypal, either personal or +3%, or USPS MO. First "I'll take it" gets it.
$350 shipped to lower 48
*I'll also throw in a Black Rain Ordnance milled charging handle, a Colt M4 buttstock, and the M4A1 Matech rear BUIS (pics added below), .