Inconsistencies in self-interested witnesses' testimony were subject to cross, and do not establish lack of sufficient evidence.
Exclusion of prior inconsistent statement to police was harmless, as inconsistencies explored elsewhere, and no contemporaneous proffer; exclusion of exited utterances by police during search was proper, since police officers don't get excited--also harmless.
Sufficient evidence for sentence enhancement based on number of firearms. Enhancement for another felony found by a preponderance can apply to firearm trafficking and possession, so long as it's not the actual underlying crime charged. Texts from incarceration referencing "snitches" sufficed for obstruction enhancement. Disparities in co-conspirators' sentences not per se unreasonable.
http://media.ca8.uscourts.gov/opndir/18/06/172189P.pdf
Since 2011. An occasional commonplacing of the U.S. Circuit Courts of Appeal.
Neither an authoritative statement of the law nor legal advice. Quick work.