Stern Defense Gun Parts

Compare prices on 106 in-stock Stern Defense gun parts from 11 stores. All gun parts

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Palmetto State Armory Updated Nov 08, 2026

10% OFF

Stern Defense RAB-AD Rapid Attach Buttstock Adapter

$140.99 $156.99

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Optics Planet Updated Oct 31, 2026

30% OFF

Stern Defense MAG-AD FLARE Magazine Well Adapter Black 001-SD MAG-ADD-FLARE

$73.00 $103.75

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Optics Planet Updated Oct 31, 2026

19% OFF

Stern Defense SD CB9 MOD2 Muzzle Device Black 003-SD CB9 MOD2-D2-MA

$56.99 $69.99

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Optics Planet Updated Oct 31, 2026

27% OFF

Stern Defense SD FH9 MOD1 Muzzle Device Black 03-SD FH9-MOD1-M

$44.99 $61.43

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Optics Planet Updated Oct 31, 2026

31% OFF

Stern Defense SD AR15 Barrel .45acp 10.5in Black ACPBRL05INCHD

$151.99 $219.60

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Optics Planet Updated Oct 31, 2026

31% OFF

Stern Defense SD AR15 Barrel .45acp 8.5in Black ACPBRL85INCHDA

$141.99 $205.20

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Optics Planet Updated Oct 31, 2026

31% OFF

Stern Defense SD AR15 Barrel .45acp 6in Black ACPBRLINCHDA

$131.99 $190.80

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Optics Planet Updated Oct 31, 2026

34% OFF

Stern Defense SD AR15 Barrel 9mm 6in Black BRLINCHD1

$109.99 $166.04

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Optics Planet Updated Oct 31, 2026

29% OFF

Stern Defense SD AR15 Barrel 9mm 161in Black BRLINCHD2

$139.00 $194.99

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Optics Planet Updated Oct 31, 2026

31% OFF

Stern Defense SD AR15 Barrel .45acp 4in Black ACPBRLINCHD1

$107.00 $154.08

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Optics Planet Updated Oct 31, 2026

31% OFF

Stern Defense SD AR15 Barrel 9mm 105in Black BRL05INCHDA

$129.99 $187.20

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Optics Planet Updated Oct 31, 2026

20% OFF

Stern Defense SD RBC45 Muzzle Device Black 003-SD RBC45-D1-M

$43.99 $54.99

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Optics Planet Updated Oct 31, 2026

20% OFF

Stern Defense SD HBC45 Muzzle Device Black 003-SD HBC45-D1-M

$39.99 $49.99

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Optics Planet Updated Oct 31, 2026

29% OFF

Stern Defense SD HBC9 Muzzle Device Black 003-SD HBC9-D1-M

$36.99 $51.99

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Optics Planet Updated Oct 31, 2026

31% OFF

Stern Defense 9mm Bolt Replacement Kit Black BOLTREPK

$34.99 $50.97

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Optics Planet Updated Oct 31, 2026

4% OFF

Stern Defense Stern Defense SD 6in MOD5 MLOK .45ACP Upper Receiver Assembly 8in M-LOK Handguard .578-28 TPI 1-16 Twist Rate Black 015SD8INMD5ML6INBR45ACPKK - $550.00 at Optics Planet

Stern Defense SD 6in MOD5 MLOK .45ACP Upper Receiver Assembly 8in M-LOK Handguard .578-28 TPI 1-16 Twist Rate Black 015SD8INMD5ML6INBR45ACPKK

$550.00 $570.12

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Optics Planet Updated Oct 31, 2026

2% OFF

Stern Defense SD 4in Mod4 M-Lok 4in Barrel 9mm Black Complete Upper Receiver Black SDINBRLKK

$419.27 $429.27

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Optics Planet Updated Oct 31, 2026

29% OFF

Stern Defense SD BU9 NiB ECHO Bolt Carrier AR-15 Glock-Pattern Upper Receiver 9mm Sliver 004-SD BU9-NiB-ECHO-D2-M

$169.99 $237.98

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Optics Planet Updated Oct 31, 2026

25% OFF

Stern Defense HS2 Hybrid 2 Stage NiB Drop In Trigger Green / Silver

$167.00 $223.33

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Optics Planet Updated Oct 31, 2026

30% OFF

Stern Defense SD BU45 Bolt Carrier AR-15 Glock-Pattern Upper Receiver .45 ACP Black 004-SD BU45-D1-M

$150.65 $214.99

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Optics Planet Updated Oct 31, 2026

30% OFF

Stern Defense SD BU9 Bolt Carrier AR-15 Glock-Pattern Upper Receiver 9mm Black 004-SD BU9-D1-M

$129.99 $185.99

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Optics Planet Updated Oct 31, 2026

8% OFF

Stern Defense SD AR15 Assembled Upper Receiver Black 12.5x3.5x3.5in 010-UPPER RECIEVER-KK-P

$109.99 $119.99

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Optics Planet Updated Oct 31, 2026

34% OFF

Stern Defense SD MOD4 M-Lok Handguards 8in Black 002-SD HG8 MOD4-M

$89.99 $136.79

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Optics Planet Updated Oct 31, 2026

30% OFF

Stern Defense SD FH45 MOD1 Muzzle Device Black 03-SD FH45-MOD1-M

$44.99 $63.99

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Optics Planet Updated Oct 31, 2026

45% OFF

Stern Defense Shock Proof Bolt Catch Black SDSPBoltCatchD

$16.50 $30.00

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Optics Planet Updated Oct 31, 2026

24% OFF

Stern Defense RAB-AD Series Rapid Attach Buttstock Adapter Black 008-SD RAB-AD-D1-M

$139.99 $184.78

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Optics Planet Updated Oct 31, 2026

24% OFF

Stern Defense RAB-AD Rapid Attach Buttstock Adapter for Pic Rail Black 008-SD RAB-AD-PIC RAIL-D1-M

$139.99 $184.78

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Optics Planet Updated Oct 31, 2026

32% OFF

Stern Defense RAB-AD Male Assembly Black 008-SD RAB-AD MALE-D2-M

$73.99 $109.44

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Optics Planet Updated Oct 31, 2026

30% OFF

Stern Defense RAB-AD Mini Male Assembly Black 008-SD RAB-AD MINI MALE-D1-M

$73.99 $104.97

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Optics Planet Updated Oct 31, 2026

3% OFF

Stern Defense Open Box Dealer Demo Stern Defense SD FH9 MOD1 Muzzle Device Black

$43.49 $44.99

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Optics Planet Updated Oct 31, 2026

9% OFF

Stern Defense Open Box Dealer Demo Stern Defense SD HBC45 Muzzle Device Black 003-SD HBC45-D1-M

$36.49 $39.99

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TLO Outdoors Updated Nov 08, 2026

3% OFF

Stern Defense Mag-AD .45 ACP M&P Magazine Adapter for AR-15 Lowers, Last Round Hold Open 001SDMAGADMP45ACPM

$197.98 $204.55

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TLO Outdoors Updated Nov 08, 2026

3% OFF

Stern Defense Mag-AD9 AR-15 Magwell Adapter for 9mm/.40 S&W Sig P320/P250 001SDMAGADMP9AND40/P32

$197.98 $204.55

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TLO Outdoors Updated Nov 08, 2026

2% OFF

Stern Defense .45 ACP 10.5in AR-15 Barrel, 4150 Chrome Moly, Melonite, Threaded 00645ACPBARREL105INCHD

$167.98 $170.80

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TLO Outdoors Updated Nov 08, 2026

2% OFF

Stern Defense .45 ACP AR-15 Barrel 16.10in 4150 Chrome Moly Steel Black Melonite 00645ACPBARREL161INCHD

$177.98 $182.00

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Where to buy Stern Defense gun parts

Optics Planet 30 in stock
Palmetto State Armory 20 in stock
Shooting Surplus 19 in stock
Ammunition Depot 13 in stock
MidwayUSA 7 in stock
GrabAGun 6 in stock
TLO Outdoors 5 in stock
Brownells.com 2 in stock

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Where to buy Stern Defense gun parts