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Shop 161 Deals on 5.56x45mm NATO Parts Kits

Browse 5.56x45mm NATO Parts Kits for sale at the lowest prices online.

Lower Parts Kits

Upper Receivers

Lower Receivers

Bolt Carrier Groups

Anderson Manufacturing Lower Parts Kit for AR-15 223/5.56 Rifle, Black - G2-K421-A000-0P - Anderson Manufacturing

Anderson Manufacturing Lower Parts Kit for AR-15 223/5.56 Rifle, Black - G2-K421-A000-0P

Anderson Manufacturing

BCMGunfighter Enhanced AR-15 Lower Parts Kit, FDE - ELPKFDE - Bcm

BCMGunfighter Enhanced AR-15 Lower Parts Kit, FDE - ELPKFDE

MAP (Minimum Advertised Price) means this product is for sale at a lower price than what the manufacturer allows advertised.

BCMGunfighter Enhanced AR-15 Lower Parts Kit, Black - ELPKBLK - Bcm

BCMGunfighter Enhanced AR-15 Lower Parts Kit, Black - ELPKBLK

MAP (Minimum Advertised Price) means this product is for sale at a lower price than what the manufacturer allows advertised.

Tacfire Lower Parts Kit w/ A2 Grip, Black - LPK01-USA - Tacfire

Tacfire Lower Parts Kit w/ A2 Grip, Black - LPK01-USA

Complete AR-15 Build Kit - Aim Sports Kit in Sleek Black Finish - AR5CUB5 - Aim Sports Inc

Complete AR-15 Build Kit - Aim Sports Kit in Sleek Black Finish - AR5CUB5

$599.99 $340.00

Tacfire Build Kit for AR-15 5.56 NATO/223 Remington Unassembled Rifle, Nitride Black - SSRK556LPK - Tacfire

Tacfire Build Kit for AR-15 5.56 NATO/223 Remington Unassembled Rifle, Nitride Black - SSRK556LPK

$489.99 $343.59

Tacfire Complete Pistol Build Kit for Semi-Auto Pistols, Black - SS-PK556-LPK - Tacfire

Tacfire Complete Pistol Build Kit for Semi-Auto Pistols, Black - SS-PK556-LPK

$451.99 $335.51

Bushmaster Lower Receiver Parts Kit, Black - 93384 - Bushmaster

Bushmaster Lower Receiver Parts Kit, Black - 93384

AR-15 Radian Weapons Builder Kit in Striking Radian Black Finish - Customizable Excellence - R0427 - Radian Weapons

AR-15 Radian Weapons Builder Kit in Striking Radian Black Finish - Customizable Excellence - R0427

MAP (Minimum Advertised Price) means this product is for sale at a lower price than what the manufacturer allows advertised.

Spike's Tactical Enhanced Lower Receiver Parts Kit 223/556, FDE - SLPK302 - Spikes Tactical

Spike's Tactical Enhanced Lower Receiver Parts Kit 223/556, FDE - SLPK302

MAP (Minimum Advertised Price) means this product is for sale at a lower price than what the manufacturer allows advertised.

Spikes Tactical

Black Rain Ordnance Lower Parts Kit - BRO-LPK-BLK - Black Rain Ordnance

Black Rain Ordnance Lower Parts Kit - BRO-LPK-BLK

$319.99 $218.00

Black Rain Ordnance

Complete AR-15 Pistol Build - Aim Sports Kit in Sleek Black Finish - AR5CUB9 - Aim Sports Inc

Complete AR-15 Pistol Build - Aim Sports Kit in Sleek Black Finish - AR5CUB9

$599.99 $449.99

Tacfire Build Kit for AR-15 300 AAC Blackout Complete Pistol, Parkerized Black - SSPK300LPK7 - Tacfire

Tacfire Build Kit for AR-15 300 AAC Blackout Complete Pistol, Parkerized Black - SSPK300LPK7

$364.99 $282.26

Desert Tech MDRX Conversion Kit, forward Eject, 5.56 NATO, 16" Threaded Barrel, 30rd, 1 Magazine - Desert Tech

Desert Tech MDRX Conversion Kit, forward Eject, 5.56 NATO, 16" Threaded Barrel, 30rd, 1 Magazine

MAP (Minimum Advertised Price) means this product is for sale at a lower price than what the manufacturer allows advertised.

PSA AR15 Upper Build Kit - 28084 - Palmetto State Armory

PSA AR15 Upper Build Kit - 28084

Palmetto State Armory

Palmetto State Armory Magpul ACS-L Lower Build Kit - Flat Dark Earth - Palmetto State Armory

Palmetto State Armory Magpul ACS-L Lower Build Kit - Flat Dark Earth

$499.36 $169.99

Palmetto State Armory

DPMS AR-15 MOE Lower Build Kit - Dpms

DPMS AR-15 MOE Lower Build Kit

PSA Magpul MOE Lower Build Kit - Flat Dark Earth - Palmetto State Armory

PSA Magpul MOE Lower Build Kit - Flat Dark Earth

Palmetto State Armory

Palmetto State Armory Lower Parts starter Kit-Black - Palmetto State Armory

Palmetto State Armory Lower Parts starter Kit-Black

Palmetto State Armory

PSA BLEM 16" 5.56 NATO 1:7 Midlength Nitride 13.5" Lightweight M-Lok MOE EPT Rifle Kit, BLUE - Palmetto State Armory

PSA BLEM 16" 5.56 NATO 1:7 Midlength Nitride 13.5" Lightweight M-Lok MOE EPT Rifle Kit, BLUE

Palmetto State Armory

Harrington & Richardson M16A1 Lower Parts Kit, Gray - Harrington & Richardson

Harrington & Richardson M16A1 Lower Parts Kit, Gray

Harrington & Richardson

PSA Classic SBA4 Lower Build Kit, Flat Dark Earth - Palmetto State Armory

PSA Classic SBA4 Lower Build Kit, Flat Dark Earth

$259.99 $199.99

Palmetto State Armory

PSA AR15 Builder's Kit - 77932389 - Palmetto State Armory

PSA AR15 Builder's Kit - 77932389

Palmetto State Armory

PSA MOE EPT Pistol Lower Build Kit With SB Tactical PDW Brace, Black - Palmetto State Armory

PSA MOE EPT Pistol Lower Build Kit With SB Tactical PDW Brace, Black

$449.99 $279.99

Palmetto State Armory

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