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AR-15 · Lower receiver
American Defense Manufacturing UIC Ambidextrous Stripped Lower Receiver
$370
Standard AR-15 lower for all five calibers. 7.62x39 steel mags can bind or fail to lock back in some magwells; an enhanced bolt catch or specific mag brand may be needed. .450 BM uses dedicated straight-wall mags that fit a standard magwell.
Build with this partOpens the builder with this part fitted. Other parts change only if they have to.
Pros and cons
Pros
- Fully ambi mag release and bolt catch
- Integral upper tension screw
- Enlarged trigger guard for gloved use
Cons
- Not compatible with triggers using anti-rotation plates
- Proprietary controls limit parts options
Other lower receiver options
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- Palmetto State Armory Sabre-15 Ambi Lower Receiver $100
- Griffin Armament Mk2 Ambidextrous Stripped Lower Receiver $220
- Radian Weapons AX556 Ambidextrous Lower Receiver $450
- Aero Precision AR15 Gen 2 Stripped Lower Receiver $120