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AR-15 & AR-10 Build Kits

Top Sellers

Black AR-15 Rear Beavertail Pistol Grip with Rubberized Coating
Black AR-15 Rear Beavertail Pistol Grip with Rubberized Coating
$9.99 $4.99
Davidson Defense NO LOGO (Trigger Engraved) AR-15 Lower Receiver - Black Anodized Type 3 Hard Coat 7075 Aluminum
Davidson Defense NO LOGO (Trigger Engraved) AR-15 Lower Receiver - Black Anodized Type 3 Hard Coat 7075 Aluminum
$79.99 $64.99
Davidson Defense 'Full House w/Gauntlet Arms Brace' 10.5-inch AR-15 5.56 NATO Nitride Pistol Full Build Kit
Davidson Defense 'Full House w/Gauntlet Arms Brace' 10.5-inch AR-15 5.56 NATO Nitride Pistol Full Build Kit
$324.99 $244.99
Davidson Defense Aegis 8.5-inch Pistol-Gas 1:8 .300 BLK AR-15 Freefloat M-Lok Handguard Pistol Upper Build Kit, Suppressor Ready
Davidson Defense Aegis 8.5-inch Pistol-Gas 1:8 .300 BLK AR-15 Freefloat M-Lok Handguard Pistol Upper Build Kit, Suppressor Ready
$174.99 $129.99
Davidson Defense Stormborn w/Gauntlet Arms Brace 7.5-inch Pistol-Gas 1:7 5.56 NATO AR-15 Freefloat M-Lok Handguard Pistol Full Build Kit
Davidson Defense Stormborn w/Gauntlet Arms Brace 7.5-inch Pistol-Gas 1:7 5.56 NATO AR-15 Freefloat M-Lok Handguard Pistol Full Build Kit
$309.99 $234.99
Davidson Defense Aegis w/Gauntlet Arms Brace 7.5-inch Pistol-Gas 1:7 5.56 NATO AR-15 Freefloat M-Lok Handguard Pistol Full Build Kit
Davidson Defense Aegis w/Gauntlet Arms Brace 7.5-inch Pistol-Gas 1:7 5.56 NATO AR-15 Freefloat M-Lok Handguard Pistol Full Build Kit
$324.99 $244.99
Davidson Defense Jungle Flame 10.5-inch AR-15 5.56 NATO Pistol Upper Build Kit
Davidson Defense Jungle Flame 10.5-inch AR-15 5.56 NATO Pistol Upper Build Kit
$224.99 $169.99
Davidson Defense 'Slade 5.56' 16.5-inch AR-15 5.56 NATO Nitride Rifle Full Build Kit
Davidson Defense 'Slade 5.56' 16.5-inch AR-15 5.56 NATO Nitride Rifle Full Build Kit
$339.99 $254.99
Spike's Tactical PHU Skull Multi-Caliber Stripped AR-15 Lower Receiver, 7075-T6 Forged, Type III Hardcoat Anodized Black
Spike's Tactical PHU Skull Multi-Caliber Stripped AR-15 Lower Receiver, 7075-T6 Forged, Type III Hardcoat Anodized Black
$119.99 $89.99
Davidson Defense Adaptive Tactical AR-15 EX Performance Adjustable Stock & Mil-Spec Buffer Tube Kit Combo (Comes With Stock & Buffer Tube Kit)
Davidson Defense Adaptive Tactical AR-15 EX Performance Adjustable Stock & Mil-Spec Buffer Tube Kit Combo (Comes With Stock & Buffer Tube Kit)
$84.99 $39.99
MMC LR-308 Rifle Lower Build Kit Featuring Sota Arms .308 Lower Receiver
MMC LR-308 Rifle Lower Build Kit Featuring Sota Arms .308 Lower Receiver
$249.99 $189.99
Davidson Defense Aegis Lightweight 10.5-inch Pistol-Gas 1:8 .300 BLK AR-15 Freefloat M-Lok Handguard Pistol Upper Build Kit
Davidson Defense Aegis Lightweight 10.5-inch Pistol-Gas 1:8 .300 BLK AR-15 Freefloat M-Lok Handguard Pistol Upper Build Kit
$184.99 $139.99
Davidson Defense Aegis Lightweight 10.5-inch Carbine-Gas 1:8 5.56 NATO AR-15 Freefloat M-Lok Handguard Pistol Complete Upper Build
Davidson Defense Aegis Lightweight 10.5-inch Carbine-Gas 1:8 5.56 NATO AR-15 Freefloat M-Lok Handguard Pistol Complete Upper Build
$264.99 $199.99
Davidson Defense Spartan Zero 7.5-inch AR-15 5.56 NATO Pistol Upper Build Kit
Davidson Defense Spartan Zero 7.5-inch AR-15 5.56 NATO Pistol Upper Build Kit
$174.99 $129.99
Davidson Defense Aegis 7.5-inch Pistol-Gas 1:7 5.56 NATO AR-15 Freefloat M-Lok Handguard Pistol Complete Upper Build
Davidson Defense Aegis 7.5-inch Pistol-Gas 1:7 5.56 NATO AR-15 Freefloat M-Lok Handguard Pistol Complete Upper Build
$254.99 $194.99
Davidson Defense Commandant 8.5-inch Pistol-Gas 1:7 5.56x45mm NATO AR-15 Freefloat M-Lok Handguard Pistol Upper Build Kit
Davidson Defense Commandant 8.5-inch Pistol-Gas 1:7 5.56x45mm NATO AR-15 Freefloat M-Lok Handguard Pistol Upper Build Kit
$179.99 $134.99

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  • Top Shelf Build Kits Top Shelf Build Kits
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  • Upper Build Kits Upper Build Kits
  • Complete Upper Build Kits Complete Upper Build Kits
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  • Side Charging Upper Receiver Builds Side Charging Upper Receiver Builds
  • FRT Lower Build Kits FRT Lower Build Kits
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  • Upper Build Starter Kits Upper Build Starter Kits
  • Finish Your Build Kit Finish Your Build Kit

Products [2649]

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Davidson Defense Ronin Competition 20-inch 22 ARC Freefloat M-Lok Handguard Rifle Upper Build Kit
Davidson Defense Ronin Competition 20-inch 22 ARC Freefloat M-Lok Handguard Rifle Upper Build Kit
$278.99 $209.99 Sale
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Ronin Competition 20-inch 22ARC Freefloat M-Lok Handguard Rifle Complete Upper Build
Ronin Competition 20-inch 22ARC Freefloat M-Lok Handguard Rifle Complete Upper Build
$410.99 $309.99 Sale
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Davidson Defense Feelin' 22 20-inch 22 ARC Freefloat Tubular M-Lok Handguard Rifle Full Build Kit
Davidson Defense Feelin' 22 20-inch 22 ARC Freefloat Tubular M-Lok Handguard Rifle Full Build Kit
$479.99 $359.99 Sale
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Davidson Defense Feelin' 22 20-inch 22 ARC Freefloat Tubular M-Lok Handguard Rifle Complete Upper Build
Davidson Defense Feelin' 22 20-inch 22 ARC Freefloat Tubular M-Lok Handguard Rifle Complete Upper Build
$419.99 $314.99 Sale
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Davidson Defense Ronin Competition 20-inch 22 ARC Freefloat M-Lok Handguard Rifle Full Build Kit
Davidson Defense Ronin Competition 20-inch 22 ARC Freefloat M-Lok Handguard Rifle Full Build Kit
$471.99 $354.99 Sale
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Davidson Defense Feelin' 22 20-inch 22 ARC Freefloat Tubular M-Lok Handguard Rifle Upper Build Kit
Davidson Defense Feelin' 22 20-inch 22 ARC Freefloat Tubular M-Lok Handguard Rifle Upper Build Kit
$284.99 $214.99 Sale
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Davidson Defense Sabretooth 20-inch 22 ARC Freefloat M-Lok Handguard Rifle Upper Build Kit
Davidson Defense Sabretooth 20-inch 22 ARC Freefloat M-Lok Handguard Rifle Upper Build Kit
$278.99 $209.99 Sale
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Davidson Defense Sabretooth 20-inch 22 ARC Freefloat M-Lok Handguard Rifle Complete Upper Build
Davidson Defense Sabretooth 20-inch 22 ARC Freefloat M-Lok Handguard Rifle Complete Upper Build
$411.99 $309.99 Sale
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Davidson Defense Sabretooth 20-inch 22 ARC Freefloat M-Lok Handguard Rifle Full Build Kit
Davidson Defense Sabretooth 20-inch 22 ARC Freefloat M-Lok Handguard Rifle Full Build Kit
$491.99 $369.99 Sale
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Davidson Defense Dust Devil w/SBA6 Brace 10.5-inch 1:8 5.56 NATO AR-15 Drop-In M-Lok Handguard Pistol Full Build Kit
Davidson Defense Dust Devil w/SBA6 Brace 10.5-inch 1:8 5.56 NATO AR-15 Drop-In M-Lok Handguard Pistol Full Build Kit
$663.99 $499.99 Sale
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Davidson Defense Dust Devil w/SBA5 Brace 10.5-inch 1:8 5.56 NATO AR-15 Drop-In M-Lok Handguard Pistol Full Build Kit
Davidson Defense Dust Devil w/SBA5 Brace 10.5-inch 1:8 5.56 NATO AR-15 Drop-In M-Lok Handguard Pistol Full Build Kit
$663.99 $499.99 Sale
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Davidson Defense Dust Devil w/SBA3 Brace 10.5-inch 1:8 5.56 NATO AR-15 Drop-In M-Lok Handguard Pistol Full Build Kit
Davidson Defense Dust Devil w/SBA3 Brace 10.5-inch 1:8 5.56 NATO AR-15 Drop-In M-Lok Handguard Pistol Full Build Kit
$663.99 $499.99 Sale
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Davidson Defense Dust Devil SBR Ready 10.5-inch 1:8 5.56 NATO AR-15 Drop-In M-Lok Handguard Pistol Full Build Kit
Davidson Defense Dust Devil SBR Ready 10.5-inch 1:8 5.56 NATO AR-15 Drop-In M-Lok Handguard Pistol Full Build Kit
$570.99 $429.99 Sale
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Davidson Defense Dust Devil w/Gauntlet Arms Brace 10.5-inch 1:8 5.56 NATO AR-15 Drop-In M-Lok Handguard Pistol Full Build Kit
Davidson Defense Dust Devil w/Gauntlet Arms Brace 10.5-inch 1:8 5.56 NATO AR-15 Drop-In M-Lok Handguard Pistol Full Build Kit
$584.99 $439.99 Sale
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Davidson Defense Dust Devil w/BTR Brace 10.5-inch 1:8 5.56 NATO AR-15 Drop-In M-Lok Handguard Pistol Full Build Kit
Davidson Defense Dust Devil w/BTR Brace 10.5-inch 1:8 5.56 NATO AR-15 Drop-In M-Lok Handguard Pistol Full Build Kit
$637.99 $479.99 Sale
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Davidson Defense Dust Devil 10.5-inch 1:8 5.56 NATO AR-15 Drop-In M-Lok Handguard Pistol Complete Upper Build
Davidson Defense Dust Devil 10.5-inch 1:8 5.56 NATO AR-15 Drop-In M-Lok Handguard Pistol Complete Upper Build
$517.99 $389.99 Sale
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Davidson Defense Dust Devil 10.5-inch 1:8 5.56 NATO AR-15 Drop-In M-Lok Handguard Pistol Upper Build Kit
Davidson Defense Dust Devil 10.5-inch 1:8 5.56 NATO AR-15 Drop-In M-Lok Handguard Pistol Upper Build Kit
$431.99 $324.99 Sale
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Davidson Defense Chipper 20-inch 22 ARC Freefloat M-Lok Handguard Rifle Upper Build Kit
Davidson Defense Chipper 20-inch 22 ARC Freefloat M-Lok Handguard Rifle Upper Build Kit
$271.99 $204.99 Sale
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Davidson Defense Chipper 20-inch 22 ARC Freefloat M-Lok Handguard Rifle Complete Upper Build
Davidson Defense Chipper 20-inch 22 ARC Freefloat M-Lok Handguard Rifle Complete Upper Build
$404.99 $304.99 Sale
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Davidson Defense Chipper 20-inch 22 ARC Freefloat M-Lok Handguard Rifle Full Build Kit
Davidson Defense Chipper 20-inch 22 ARC Freefloat M-Lok Handguard Rifle Full Build Kit
$464.99 $349.99 Sale
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Davidson Defense Left Hook 10.5-inch 1:8 556 AR-15 Drop-In Quad-Rail Handguard Pistol Upper Build Kit
Davidson Defense Left Hook 10.5-inch 1:8 556 AR-15 Drop-In Quad-Rail Handguard Pistol Upper Build Kit
$218.99 $164.99 Sale
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Davidson Defense Left Hook 10.5-inch 1:8 556 AR-15 Drop-In Quad-Rail Handguard Pistol Complete Upper Build
Davidson Defense Left Hook 10.5-inch 1:8 556 AR-15 Drop-In Quad-Rail Handguard Pistol Complete Upper Build
$304.99 $229.99 Sale
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Davidson Defense Left Hook w/BTR Brace 10.5-inch 1:8 556 AR-15 Drop-In Quad-Rail Handguard Pistol Full Build Kit
Davidson Defense Left Hook w/BTR Brace 10.5-inch 1:8 556 AR-15 Drop-In Quad-Rail Handguard Pistol Full Build Kit
$424.99 $319.99 Sale
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Davidson Defense Left Hook w/Gauntlet Arms Brace 10.5-inch 1:8 556 AR-15 Drop-In Quad-Rail Handguard Pistol Full Build Kit
Davidson Defense Left Hook w/Gauntlet Arms Brace 10.5-inch 1:8 556 AR-15 Drop-In Quad-Rail Handguard Pistol Full Build Kit
$371.99 $279.99 Sale
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1 2 3 4 5 6 7 ...111 Next Page View All

Our MMC Combos AR-15 and LR-308 Upper Build Kits make it easy to get started on your custom build. Our expert team plans these combos to make sure that all parts are compatible to take any guess work out of the equation. We carry combos that fit any budget from plinker to competition and anything in between. Some of the brands that are featured in our combos are MMC Armory, Faxon, Fail Zero, Fortis, Odin Works, Guntech, Armaspec, 3rd Gen Tactical, Battle Arms Developement, and many more. We also have options in a wide variety of calibers such as .223 Wylde, 5.56 NATO, .224 Valkyrie, 350 Legend, .458 SOCOM, 12.7x42 (.50 Beowulf), .450 Bushmaster, 9mm, 7.62x39, 300 Blackout (AAC), 6.5 Creedmoor, 6.5 Gendel, 45 ACP, and .243 WIN
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