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Black AR-15 Lower Receiver Parts

Black AR-15 lower parts kits for finishing out your lower receiver. AT3 uses parts that meet or exceed mil-spec in all the LPKs we offer.

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AT3™ Pro-Builder™ AR-15 Lower Parts Kit - No Grip or Trigger Assembly
(123)

AT3™ Pro-Builder™ AR-15 Lower Parts Kit – No Grip or Trigger Assembly
9 Options
from $29.99
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CMMG ZEROED Extended Bolt Catch for AR-15
(1)

CMMG ZEROED Extended Bolt Catch for AR-15
$12.60
Only
$10.71
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Troy Ambidextrous AR15 Magazine Release
(1)

Troy Ambidextrous AR-15 Magazine Release
$68.99
Only
$58.64
Out of Stock
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LBE Unlimited AR Bolt Catch Assembly
(6)

LBE Unlimited AR Bolt Catch Assembly
$7.99
Only
$6.79
Out of Stock
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Battle Arms Development BAD-ASS-PRO Professional Ambidextrous Safety Selector Reversible 90/60

Battle Arms Development BAD-ASS-PRO Professional Ambidextrous Safety Selector Reversible 90/60
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Sale!
Luth-AR AR10 Lower Parts Kit

Luth-AR AR-10 Lower Parts Kit
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for Price
Out of Stock
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Sale!
(2)

Radian Weapons Extended AR-15 Bolt Catch
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for Price
Out of Stock
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Sale!
Geissele Standard AR-15 Lower Parts Kit with Pistol Grip

Geissele Standard AR-15 Lower Parts Kit with Pistol Grip
$68.00
Only
$57.80
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Luth-AR Field Repair Kit

Luth-AR Field Repair Kit
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Geissele Ultra Duty Checkered AR-15 Takedown Pin Set

Geissele Ultra Duty Checkered AR-15 Takedown Pin Set
$28.00
Only
$23.80
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Rise Armament Premium AR-15 Lower Parts Kit - No Grip - Black

Rise Armament Premium AR-15 Lower Parts Kit – No Grip – Black
$129.99
Only
$110.49
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Battle Arms Development Enhanced Ambidextrous Bolt Catch Lever
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Battle Arms Development BAD-ASS-ELITE Fiber Optic Ready Ambidextrous Safety Selector Reversible 90/60

Battle Arms Development BAD-ASS-ELITE Fiber Optic Ready Ambidextrous Safety Selector Reversible 90/60
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for Price
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Battle Arms Development Enhanced 9mm AR-15 Bolt Catch - AT3 Tactical

Battle Arms Development Enhanced 9mm AR-15 Bolt Catch
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Battle Arms Development Billet Enhanced Trigger Guard Assembly

Battle Arms Development Billet Enhanced Trigger Guard Assembly
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Out of Stock
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(73)

AT3™ Ambidextrous AR-15 Safety Selector – 9 Colors Available
9 Options
from $27.99
Out of Stock
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NEW
AT3 Tactical AR-15 Lower Build Kit - BCM Furniture

AT3 Tactical AR-15 Lower Build Kit – BCM Furniture
Only
$157.13
Out of Stock
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AT3 Tactical AR-15 Lower Build Kit - Fab Defense Furniture

AT3 Tactical AR-15 Lower Build Kit – Fab Defense Furniture
Only
$165.72
Out of Stock
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NEW
AT3 Tactical AR-15 Lower Build Kit - UTG Furniture

AT3 Tactical AR-15 Lower Build Kit – UTG Furniture
Only
$129.12
Out of Stock
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NEW
AT3 Tactical A2 Retro AR-15 Lower Build Kit

AT3 Tactical A2 Retro AR-15 Lower Build Kit
Only
$133.82
Out of Stock
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NEW
AT3 Tactical MIL-SPEC AR-15 Lower Build Kit

AT3 Tactical MIL-SPEC AR-15 Lower Build Kit
Only
$109.17
Out of Stock
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NEW
AT3 Tactical MIL-SPEC AR-15 Lower Build Kit w/Brace

AT3 Tactical MIL-SPEC AR-15 Lower Build Kit w/Brace
Only
$145.69
Out of Stock
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NEW
AT3 Tactical AR-15 Lower Build Kit - Magpul MOE K Furniture

AT3 Tactical AR-15 Lower Build Kit – Magpul MOE K Furniture
Only
$150.97
Out of Stock
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AT3 Tactical AR-15 Lower Build Kit - B5 Furniture

AT3 Tactical AR-15 Lower Build Kit – B5 Furniture
Only
$158.02
Out of Stock
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