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parts
Last Seen
May 20, 2026
Maxim Defense Industries MDX 510 U.R.G. AR-15 .300 AAC Blackout 10.3 inch Upper Receiver Pistol Length 1-8 Twist 5/8x24 HATEBRAKE Black
Sold byOptics Planet•Posted Apr 27, 2026
Compare prices for Maxim Defense MDX 510 AR-15 Complete Upper Receiver 300 AAC Blackout 10.3" Barrel Black$1,255.50
$1,395.00
You save $139.50 (10% off)
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Deal Summary
- Currently in stock.
- Category: parts
- UPC: 680017479893
- SKU: MDI-URC-MDX510-MXM-47989
- Brand: Maxim Defense
Price History
Deal Details
Maxim Defense Industries MDX 510 U.R.G. AR-15 .300 AAC Blackout 10.3 inch Upper Receiver Pistol Length 1-8 Twist 5/8x24 HATEBRAKE Black. It comes with either our Mil-Spec bolt carrier group or SCW bolt carrier group for those using our SCW system. For those wanting a standard length short barrel the 10.3 barrel of the MDX510 is your best choice. Like our other uppers the MDX510 includes our HATEBRAKE for increased reliability Radian Raptor charging handle and Maxim Defense hand stop Specificatio
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Active offers from your catalog for Maxim Defense MDX 510 AR-15 Complete Upper Receiver 300 AAC Blackout 10.3" Barrel Black.
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Lowest Price: $1,255.50
Highest Price: $1,255.50
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Maxim Defense Industries MDX 510 U.R.G. AR-15 .300 AAC Blackout 10.3 inch Upper Receiver Pistol Length 1-8 Twist 5/8x24 HATEBRAKE Black
Maxim Defense IndustriesOptics PlanetSKU/UPC: MDI-URC-MDX510-MXM-47989
$1,255.50$1,395.00Save 10%
View at Optics Planet
Maxim Defense MDX 510 AR-15 Complete Upper Receiver 300 AAC Blackout 10.3" Barrel Black
Maxim DefenseMidwayUSASKU/UPC: 672622
$1,255.50
View at MidwayUSA