User Ratings
No ratings yet
Be the first to review this product
Sig Sauer MCX/MPX 1913 interface folding Mil-Spec stock. Mounts to 1913 interface and accepts standard AR-15 type stocks. Compatible with MCX and MPX rifles. Black finish.
Specifications
- Manufacturer:
- Sig Sauer
- Category:
- stock-brace
- Platforms:
- AR-15
- UPC:
- 798681544042
- MPN:
- STOCK-X-FOLD-M4-BLK
- Required Component:
- Yes
Parts Cabinet
Track parts you own or plan to buy.
Where to Buy
Have one to sell?
Sponsored
MantisX
The smart way to train your AR build
Built your rifle — now train it. BlackBeardX installs in minutes and turns your AR into a full dry fire system with smart feedback on every pull.
Shop BlackBeardXPrice History
Current
$139.99
Lowest
$139.99
Highest
$199.99
Price Alert
Sign in to save a target price and receive an email when this component drops.
Sign In to Set AlertSimilar Products
CTR Carbine Stock – Mil-Spec
Magpul
$64.95
3RD Gen Armory SOPMOD Buttstock
3RD Gen Armory
$66.99
B5 SYSTEMS BRAVO COLLAPSIBLE MIL-SPEC STOCK FOR AR-15
B5 Systems
$52.63
Bravo Company BCMGunfighter Mod 0 SOPMOD Stock Assembly (Polymer Black) for AR-15
Bravo Company
$51.84
Magpul DT Carbine AR-15 Mil-Spec Stock Dual Tension Flat Dark Earth MAG1377-FDE
Magpul
$45.22
B5 Systems Bravo Mil-Spec AR-15 Carbine Stock Black QD Sling Mount BRV-1082
B5 Systems
$47.99
Magpul MAG310-FDE CTR Carbine Stock Flat Dark Earth Synthetic for AR-15, M16, M4 with Mil-Spec Tube
Magpul
$44.99
SB Tactical SBA3 5-Position Adjustable Pistol Brace (No Buffer Tube) | Black
SB Tactical
$64.99
Builds Using This Part
No builds yet — be the first to use this part.
Related Guides
Guide
AK Furniture and Ergonomics: Stocks, Handguards, and Practical Setup
How AK stock and handguard choices affect control, heat management, optic height, and practical shooting ergonomics.
5 min read
Guide
The AK Platform: Core Design, Strengths, and Builder Tradeoffs
A practical AK overview covering operating system basics, parts ecosystem realities, and where the AK platform shines compared to AR-pattern rifles.
8 min read
Guide
The AR-10 Platform: What It Is and How It Differs from the AR-15
A practical overview of the AR-10 — its origins, how it differs from the AR-15, available calibers, and when it makes more sense than a standard AR-15 build.
6 min read