GunPartPicker
SIG Sauer MCX Stock Adapter Kit

Sig Sauer

SIG Sauer MCX Stock Adapter Kit

5.0 (3 reviews)
Type: Mil-Spec
Storage: Carbine
$125
Currently Available
SIG Sauer Stock Adapter - 1913 Interface Folding Knuckle

Sig Sauer

SIG Sauer Stock Adapter - 1913 Interface Folding Knuckle

5.0 (2 reviews)
$95
Currently Available
Law Tactical AR Folding Stock Adapter Gen 3-M

Law Tactical

Law Tactical AR Folding Stock Adapter Gen 3-M

Type: Mil-Spec
Storage: Carbine
$250
Currently Available
Law Tactical AR Folding Stock Adapter Gen 3 - HK

Law Tactical

Law Tactical AR Folding Stock Adapter Gen 3 - HK

4.7 (3 reviews)
Type: Mil-Spec
Storage: Carbine
Material: Steel
$369
Currently Unavailable
Law Tactical Gen 3 Folding Stock Adapter - FDE

Law Tactical

Law Tactical Gen 3 Folding Stock Adapter - FDE

5.0 (1 review)
Type: Mil-Spec
Storage: Carbine
Color: FDE
$211
Currently Unavailable
Sylvan Arms AR-15 Folding Stock Adapter - Gen 3

Sylvan Arms

Sylvan Arms AR-15 Folding Stock Adapter - Gen 3

Type: Mil-Spec
Storage: Carbine
Material: Aluminum
$114
Currently Unavailable
Law Tactical Gen 3 AR Folding Stock Adapter - ODG

Law Tactical

Law Tactical Gen 3 AR Folding Stock Adapter - ODG

Type: Mil-Spec
Storage: Carbine
Color: OD Green
Price N/A
Currently Unavailable
KNS Precision AR/MCX Stock Adapter Kit without Flange

KNS Precision

KNS Precision AR/MCX Stock Adapter Kit without Flange

Type: Mil-Spec
Storage: Carbine
Material: Aluminum
Price N/A
Currently Unavailable
KNS Precision AR/MCX Stock Adapter Kit with Flange

KNS Precision

KNS Precision AR/MCX Stock Adapter Kit with Flange

Type: Mil-Spec
Storage: Carbine
Price N/A
Currently Unavailable
DFA Modified Cycle System (MCS) RIFLE CALIBER with Right Side Folding Stock - Adaptor GEN 2

Dead Foot Arms

DFA Modified Cycle System (MCS) RIFLE CALIBER with Right Side Folding Stock - Adaptor GEN 2

5.0 (1 review)
Type: Mil-Spec
Storage: Rifle
Price N/A
Currently Unavailable
KNS Precision Lage Folding Stock Gear Head Works Tailhook Adapter

KNS Precision

KNS Precision Lage Folding Stock Gear Head Works Tailhook Adapter

Type: Mil-Spec
Storage: Carbine
Price N/A
Currently Unavailable
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Stock Adapter: most added in August 2026

The stock adapter parts builders added most in August 2026, ranked from every build on GunPartPicker.

  1. 1.SIG Sauer MCX Stock Adapter KITSig Sauer
  2. 2.SIG Sauer Stock Adapter - 1913 Interface Folding KnuckleSig Sauer
  3. 3.Law Tactical AR Folding Stock Adapter Gen 3 - HKLaw Tactical
  4. 4.Law Tactical AR Folding Stock Adapter Gen 3-MLaw Tactical
  5. 5.Sylvan Arms AR-15 Folding Stock Adapter - Gen 3Sylvan Arms

Updated · counts come from real builds on GunPartPicker

Prices checked · refreshed daily across 31 retailers