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The Aero Precision M4E1 Complete Lower Receiver with ALG QMS Trigger is the perfect base for your AR build. This complete lower features an M4E1 Lower and is upgraded to include a B5 P23 & Bravo Stock.
Includes:
M4E1 Lower Receiver
B5 P23 Grip
Bravo Stock
PRO Ambi Safety Selector
EZ Install AR15 Pivot/Takedown Pin Dish Set
Carbine Receiver Extension
AR15 Carbine Buffer and Spring
ALG QMS Trigger
These parts are installed