ATI Alpha Maxx Stripped Lower and Upper Receiver Combo, Black, Multi-Cal

The ATI Alpha Maxx Receiver Combo (ATI part no. ATIGRCVAMXBLK) pairs a stripped AR-15 lower and upper receiver from the same production run, giving builders a matched-fit starting point for a custom rifle or pistol build.

Key Specifications

• Multi-caliber compatible stripped lower receiver, accepting any standard AR-15 fire control group.
• Matched stripped upper receiver from the same set for consistent fit.
• Finished in black for a standard tactical appearance.
• Overall combo length of 11.4 inches as shipped.
• Constructed from reinforced polymer with over-molded metal inserts at pressure-bearing points for added durability.
• Machined to mil-spec AR-15 dimensions for standard parts and accessory compatibility.
• Includes patented hammer and trigger pin locking screws to prevent pin walk.

Frequently Asked Questions

Is this a complete firearm? The lower receiver is the serialized firearm and ships to your local FFL for transfer; the upper receiver is an unregulated accessory.

What else do I need to build with this? A fire control group, stock/brace, and a complete upper build (barrel, bolt carrier group, handguard) to finish the rifle.

Buy the ATI Alpha Maxx Receiver Combo

Order through American Tactical / ATI‘s AR-15 build kits lineup, and our Lubbock, Texas team will walk the serialized lower through the FFL transfer process.