Aero Precision .450 Bushmaster Parts for AR-15
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Aero Precision Assembled XL Upper Receiver for Big Bore AR-15 – Enlarged Ejection Port
AR-15 Upper for Big Bore Calibers - .450 Bushmaster, .458 SOCOM, .50 Beowulf If you're planning a big bore build for your AR-15, one area that often goes overlooked is...2 Options
For bigger brass, you need a bigger ejection port. Aero Precision’s XL upper receiver is built with large calibers like .450 Bushmaster in mind, ensuring reliable function and ejection.
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