5.56 complete upper Listing ID: 2950351

Less than a thousand rounds through it, about 200 rounds of that suppressed. I put $1,200 into parts and labor.

Parts list:
•Spikes upper receiver
•Spikes upper parts kit
•Spikes gas tube
•Geissele MK8 rail
•Rosco bloodline 14.5” barrel
•Superlative bleed off gas block
•Surefire 3 prong flash hider
•Radian Raptor charging handle
•Fail zero BCG