Lower Parts Kit for AR-15

From complete kits to individual pieces, AT3 has the lower parts you need to build your ultimate AR-15.

We provide high-quality lower receiver parts kit, safety selector, and mag release. READ MORE

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Other Lower Receiver Components for AR 15:

AT3™ Mil Spec Buffer Tube Kit For AR-15AR 15 Buffer Tube Parts (Receiver Extension)
1005 Tactical 2-Stage Nickel Boron AR-15 Trigger Assembly - 4.5 lb Pull WeightAR-15 Triggers
Hogue AR-15/M-16 OverMolded Collapsible Buttstock (Commercial)Buttstocks
AT3™ 2-Stage Lower Parts Kit with 1005 Tactical Nickel Boron Trigger - No Grip or Trigger GuardLower Parts Kit for AR-15
Magpul M3 25 Rd Magazine - 308 Win/7.62NATO Caliber - Fits DPMS/SR25/LaRue OBR - MAG292Magazines & Parts
Magpul MOE+ Grip w/ Storage Compartment for Pistol GripPistol Grips
Magpul Trigger Guard for AR 15 - MAG417AR-15 Trigger Guards