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What Does the Lower Receiver Do?

The lower receiver acts as the command center for the firearm. It holds several critical components together:

  • The Fire Control Group (FCG): This includes the trigger, hammer, disconnect, and safety selector switch.

  • The Magazine Well: The housing where the ammunition magazine is inserted and locked into place.

  • The Grip and stock: It provides the attachment points for the pistol grip and the receiver extension (buffer tube), which houses the recoil spring and supports the stock.

DPMS SBA3 Pistol Lower Build Kit, Fits AR-15, SBA3 Pistol Stabilizing Brace, Magpul MOE Pistol Grip, Black DP51655152953

DPMS SBA3 Pistol Lower Build Kit, Fits A..

$169.99

DPMS SBA3 Pistol Lower Build Kit, Fits AR-15, SBA3 Pistol Stabilizing Brace, Magpul MOE Pistol Grip, Black DP51655152953

Dpms
Panther Claw
Multi
Semiautomatic
MPN : DP51655152953
UPC : 810141220577
$169.99
Ships From Warehouse
Sons of Liberty Gun Works Stripes Lower Receiver, Complete Lower Receiver, Multi Cal, Anodized Finish, Black, No Stock, Includes L2S Trigger, Ambidextrous Safety, B5 Grip, and Buffer System L-Stripes-L2S-AMBI-A-BLK

Sons of Liberty Gun Works Stripes Lower ..

$550.00

Sons of Liberty Gun Works Stripes Lower Receiver, Complete Lower Receiver, Multi Cal, Anodized Finish, Black, No Stock, Includes L2S Trigger, Ambidextrous Safety, B5 Grip, and Buffer System L-Stripes-L2S-AMBI-A-BLK

Sons Of Liberty Gun Works
Stripes Logo Lower Receiver
Multi
MPN : L-Stripes-L2S-AMBI-A-BLK
UPC : 657628674474
$550.00
Ships From Warehouse
Sons of Liberty Gun Works Stripes Lower Receiver, Complete Lower Receiver, Multi Cal, Anodized Finish, Black, No Stock, Includes LFT Trigger, Safety, B5 Grip, and Buffer System L-Stripes-LFT-MS-A-BLK

Sons of Liberty Gun Works Stripes Lower ..

$475.00

Sons of Liberty Gun Works Stripes Lower Receiver, Complete Lower Receiver, Multi Cal, Anodized Finish, Black, No Stock, Includes LFT Trigger, Safety, B5 Grip, and Buffer System L-Stripes-LFT-MS-A-BLK

Sons Of Liberty Gun Works
Stripes Logo Lower Receiver
Multi
MPN : L-Stripes-LFT-MS-A-BLK
UPC : 657628674467
$475.00
Ships From Warehouse
Wilson Combat Lower Receiver Aluminum Black Anodized Rifle

Wilson Combat Lower Receiver Aluminum Bl..

$109.99

Wilson Combat Lower Receiver Aluminum Black Anodized Rifle

Wilson Combat
WC-15F
MULTI
MPN : 810025507312
UPC : 810025507312
$109.99
In Stock
Bravo Company Complete Lower Receiver, AR-15, Multi Caliber, Anodized Finish, Black, BCM MK2 Recoil Mitigation System, BCM SOPMOD 2 Widebody Stock, 7075 T6 Aluminum, Factory Cosmetic Blem BCMLRG-RMS-STK-MOD-2-SPMD-BLK-COSMO

Bravo Company Complete Lower Receiver, A..

$504.00

Bravo Company Complete Lower Receiver, AR-15, Multi Caliber, Anodized Finish, Black, BCM MK2 Recoil Mitigation System, BCM SOPMOD 2 Widebody Stock, 7075 T6 Aluminum, Factory Cosmetic Blem BCMLRG-RMS-STK-MOD-2-SPMD-BLK-COSMO

Bravo Company
BCM
Multi
MPN : BCMLRG-RMS-STK-MOD-2-S
UPC : 812526024374
$504.00
Ships From Warehouse
Battle Arms Development Workhorse, 223 Remington/556NATO, Anodized Finish, Black, B5 Stock, Complete Lower Receiver WH-LR-R-B5

Battle Arms Development Workhorse, 223 R..

$369.99

Battle Arms Development Workhorse, 223 Remington/556NATO, Anodized Finish, Black, B5 Stock, Complete Lower Receiver WH-LR-R-B5

Battle Arms
Workhorse
Multi
Semiautomatic
MPN : WH-LR-R-B5
UPC : 810033783913
$369.99
Ships From Warehouse
Spike's Tactical Lower, Color Filled, Semi-automatic, 223 Rem/556NATO, Black Finish, 6 Position Collapsible Stock, Mil-Spec Buffer Tube, ST-T2 Tungsten Heavy Buffer STLC200-SBS-CFS

Spike's Tactical Lower, Color Filled, Se..

$292.50

Spike's Tactical Lower, Color Filled, Semi-automatic, 223 Rem/556NATO, Black Finish, 6 Position Collapsible Stock, Mil-Spec Buffer Tube, ST-T2 Tungsten Heavy Buffer STLC200-SBS-CFS

Spike'S Tactical
STLC200
Multi
Semiautomatic
MPN : STLC200-SBS-CFS
UPC : 815648021658
$292.50
Ships From Warehouse
San Tan Tactical STT-15L, Pillar Lower/Upper Receiver Set, Multi Caliber, Anodized Finish, Olive Drab Green STT15L-COMBO-ANO-OD

San Tan Tactical STT-15L, Pillar Lower/U..

$459.99

San Tan Tactical STT-15L, Pillar Lower/Upper Receiver Set, Multi Caliber, Anodized Finish, Olive Drab Green STT15L-COMBO-ANO-OD

San Tan Tactical
STT-15L
Multi
Semiautomatic
MPN : STT15L-COMBO-ANO-OD
UPC : 687051693490
$459.99
Ships From Warehouse
FMK Firearms AR-1 Lower, AR-15, Stripped, Polymer Receiver, Dark Earth Color FMKGAR1EDE

FMK Firearms AR-1 Lower, AR-15, Stripped..

$32.99

FMK Firearms AR-1 Lower, AR-15, Stripped, Polymer Receiver, Dark Earth Color FMKGAR1EDE

Fmk Firearms
Ar-1
Multi
Semiautomatic
MPN : FMKGAR1EDE
UPC : 850979004260
$32.99
Ships From Warehouse
Sharps Bros. SBLR07, Gen 2 Overthrow (Spartan Helmet Design), Billet Lower Receiver, 223 Rem/556NATO, Bronze Cerakote Finish by Blowndeadline, CNC Machined from a 7075 Billet Aluminum SBLR07-BD-BRONZE

Sharps Bros. SBLR07, Gen 2 Overthrow (Sp..

$340.00

Sharps Bros. SBLR07, Gen 2 Overthrow (Spartan Helmet Design), Billet Lower Receiver, 223 Rem/556NATO, Bronze Cerakote Finish by Blowndeadline, CNC Machined from a 7075 Billet Aluminum SBLR07-BD-BRONZE

Sharps Bros
SBLR07
Multi
Semiautomatic
MPN : SBLR07-BD-BRONZE
UPC : 850869008743
$340.00
Ships From Warehouse
San Tan Tactical STT-15, Semi-automatic, Lower/Upper Set, 223 Rem, 556NATO, N/A, Black, N/A STT-15L-LT-PILLAR-CMB

San Tan Tactical STT-15, Semi-automatic,..

$450.00

San Tan Tactical STT-15, Semi-automatic, Lower/Upper Set, 223 Rem, 556NATO, N/A, Black, N/A STT-15L-LT-PILLAR-CMB

San Tan Tactical
STT-15
Multi
Semiautomatic
MPN : STT-15L-LT-PILLAR-CMB
UPC : 680599034015
$450.00
Ships From Warehouse
San Tan Tactical STT-15, Semi-automatic, Lower, 223 Rem, 556NATO, N/A, Black, N/A STT-15L-LT-LWR

San Tan Tactical STT-15, Semi-automatic,..

$259.99

San Tan Tactical STT-15, Semi-automatic, Lower, 223 Rem, 556NATO, N/A, Black, N/A STT-15L-LT-LWR

San Tan Tactical
STT-15
Multi
Semiautomatic
MPN : STT-15L-LT-LWR
UPC : 680599034039
$259.99
Ships From Warehouse
Fortis Manufacturing, Inc. License Gen 2 Ambidextrous, Semi-automatic, Stripped Lower Receiver, 223 Remington, 556NATO, Black Color, Anodized Finish, Carbon Fiber, Ambidextrous Mag and Bolt Release L-7075-GEN2-A

Fortis Manufacturing, Inc. License Gen 2..

$237.45

Fortis Manufacturing, Inc. License Gen 2 Ambidextrous, Semi-automatic, Stripped Lower Receiver, 223 Remington, 556NATO, Black Color, Anodized Finish, Carbon Fiber, Ambidextrous Mag and Bolt Release L-7075-GEN2-A

Fortis Manufacturing
License Gen 2
Multi
Semiautomatic
MPN : L-7075-GEN2-A
UPC : 850015927232
$237.45
Ships From Warehouse
FMK Firearms AR-15 Lower, Semi-automatic, Black Finish, Polymer FMKGAR1E

FMK Firearms AR-15 Lower, Semi-automatic..

$32.99

FMK Firearms AR-15 Lower, Semi-automatic, Black Finish, Polymer FMKGAR1E

Fmk Firearms
Ar-15
Multi
Semiautomatic
MPN : FMKGAR1E
UPC : 850979004338
$32.99
Ships From Warehouse
FMK Firearms AR-1, Lower, AR-15, Stripped, Polymer Receiver, Blue Jay Color FMKGAR1ETB

FMK Firearms AR-1, Lower, AR-15, Strippe..

$39.95

FMK Firearms AR-1, Lower, AR-15, Stripped, Polymer Receiver, Blue Jay Color FMKGAR1ETB

Fmk Firearms
Ar-1
Multi
Semiautomatic
MPN : FMKGAR1ETB
UPC : 850979005649
$39.95
Ships From Warehouse
FMK Firearms AR-1 Lower, AR-15, Stripped, Polymer Receiver, Burnt Bronze Color FMKGAR1EBRT

FMK Firearms AR-1 Lower, AR-15, Stripped..

$32.99

FMK Firearms AR-1 Lower, AR-15, Stripped, Polymer Receiver, Burnt Bronze Color FMKGAR1EBRT

Fmk Firearms
Ar-1
Multi
Semiautomatic
MPN : FMKGAR1EBRT
UPC : 850979005618
$32.99
Ships From Warehouse
Doublestar Corp. Stripped Lower, STAR-15, Semi-automatic, 223 Remington/5.56 NATO, Anodized Finish, Black DSCL101

Doublestar Corp. Stripped Lower, STAR-15..

$93.99

Doublestar Corp. Stripped Lower, STAR-15, Semi-automatic, 223 Remington/5.56 NATO, Anodized Finish, Black DSCL101

Doublestar
Stripped Lower
Multi
Semiautomatic
MPN : DSCL101
UPC : 841348102496
See Best Price in Cart
In Stock
SHIELD SAO-15 SA-15 LOWER NON FLDING STOCK

SHIELD SAO-15 SA-15 LOWER NON FLDING S..

$112.50

SHIELD SAO-15 SA-15 LOWER NON FLDING STOCK

Shield Arms
SAO-15
Multi
MPN : SAO15
UPC : 853465008049
$112.50
Ships From Warehouse
Shield Arms SA-15, Stripped Lower Receiver, 223Rem/556NATO, Black SA-15-SLU

Shield Arms SA-15, Stripped Lower Receiv..

$297.00

Shield Arms SA-15, Stripped Lower Receiver, 223Rem/556NATO, Black SA-15-SLU

Shield Arms
S15
9 mm
Semiautomatic
MPN : SA-15-SLU
UPC : 853465008056
$297.00
Ships From Warehouse
Wilson Combat TRLOWERKB15 Lower Receiver Kit Rifle Universal

Wilson Combat TRLOWERKB15 Lower Receive..

$57.95

Wilson Combat TRLOWERKB15 Lower Receiver Kit Rifle Universal

Wilson Combat
TR-LOWERK-B15
Multi
MPN : TRLOWERKB15
UPC : 810025505424
$57.95
Ships From Warehouse
Timber Creek Outdoors GLPKD Greyman Lower Parts Kit AR-Platform Desert

Timber Creek Outdoors GLPKD Greyman Lowe..

$95.99

Timber Creek Outdoors GLPKD Greyman Lower Parts Kit AR-Platform Desert

Timber Creek Outdoors
Greyman
Multi
MPN : GLPKD
UPC : 816397029094
$95.99
Ships From Warehouse
Timber Creek Outdoors GLPKBL Greyman Lower Parts Kit AR-Platform Black

Timber Creek Outdoors GLPKBL Greyman Low..

$95.99

Timber Creek Outdoors GLPKBL Greyman Lower Parts Kit AR-Platform Black

Timber Creek Outdoors
Greyman
Multi
MPN : GLPKBL
UPC : 840253801234
$95.99
Ships From Warehouse
Radian Weapons AX556, Billet Upper/Lower Set, Semi-Automatic, 556 NATO/223 Remington, Ambidextrous, Cerakote Finish, Black, Includes Radian Talon Ambidextrous Safety, Hammer Pin, 8.5 MLOK Handguard R0435

Radian Weapons AX556, Billet Upper/Lower..

$1219.95

Radian Weapons AX556, Billet Upper/Lower Set, Semi-Automatic, 556 NATO/223 Remington, Ambidextrous, Cerakote Finish, Black, Includes Radian Talon Ambidextrous Safety, Hammer Pin, 8.5 MLOK Handguard R0435

Radians
AX556
Multi
Semiautomatic
MPN : R0435
UPC : 817093024185
$1219.95
Ships From Warehouse
Radian Weapons R0427 Model 1 Builder Kit 10 Magpul M-LOK Handguard

Radian Weapons R0427 Model 1 Builder Kit..

$1254.95

Radian Weapons R0427 Model 1 Builder Kit 10 Magpul M-LOK Handguard

Radians
Builder Kit
Multi
MPN : R0427
UPC : 817093026875
$1254.95
Ships From Warehouse
Radian Weapons R0406 Model 1 Builder Kit 15.50 Magpul M-LOK Handguard

Radian Weapons R0406 Model 1 Builder Kit..

$1399.95

Radian Weapons R0406 Model 1 Builder Kit 15.50 Magpul M-LOK Handguard

Radians
Model 1
Multi
Semiautomatic
MPN : R0406
UPC : 817093023898
$1399.95
Ships From Warehouse
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