Mega Arms MTS Monolithic AR15 Upper Review

Mega Arms MTS Modular Monolithic AR15 Upper V2 Review

Several months ago, I reviewed the Mega Arms GTR-3S Billet lower receiver.  Initially the Mega Billet lower was the foundation for a DPMS Oracle kit build, but since has been a favorite base testing platform for a number of AR upper builds. Mega’s billet lower was of such high quality that I couldn’t …