Aero Precision APCR640438: Aero Precision has been long known in the bulder community for their quality and feature rich componets, that tradition continues here. We are excited to now offer a turn key solution for those who may not be interested in building a rifle. This complete AR-15 rifle ships with an Aero Precision M4E1 Lower, SM15 ATLAS S-ONE 15\" M-LOK Handguard, Magpul MOE SL carbine stock, and 30 round magazine.