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Sig Sauer
Overview
The SIG Sauer MCX Stock Adapter Kit is designed to allow builders to attach a standard carbine stock to their MCX platform. This adapter is compatible with Mil-Spec buffer tubes, ensuring a secure fit and reliable operation. It’s particularly well-suited for builds featuring a mid-length gas system and chambered in 5.56 NATO, making it a popular choice for those looking to enhance their rifle's versatility and ergonomics.
Based on build data
Strike Industries Flat Wire Spring for AR Carbine - AR-FWS-C
Fortis Lightweight Enhanced AR-15 End Plate, Gold - LE-BLK-K1-GOLD
CMMG AR-15 HD Pivot and Takedown Pin Parts Kit - 55AFF3B
Strike Industries Extended Bolt Catch
Bravo Company Ar-15/m16 Bcm Mil-Spec 6 Position Receiver Extension
Geissele Automatics Premium Mil-Spec Buffer Tube Assembly With Super 42 H3 - Ddc
Aggregated and anonymized data showing how builders use this product
| Product | Category | Times Built Together |
|---|---|---|
| Strike Industries Flat Wire Spring for AR Carbine - AR-FWS-C | 97 | |
| Fortis Lightweight Enhanced AR-15 End Plate, Gold - LE-BLK-K1-GOLD | 76 | |
| CMMG AR-15 HD Pivot and Takedown Pin Parts Kit - 55AFF3B | 61 | |
| Strike Industries Extended Bolt Catch | 61 | |
| Bravo Company Ar-15/m16 Bcm Mil-Spec 6 Position Receiver Extension | 60 | |
| Geissele Automatics Premium Mil-Spec Buffer Tube Assembly With Super 42 H3 - Ddc | 57 |
| Platform | Percentage |
|---|---|
| AR-15 | 80% |
| AR-10 | 16% |
| AR-9 | 4% |
| Caliber | Percentage |
|---|---|
| 5.56 NATO | 75% |
| 300 Blackout | 18.8% |
| .458 SOCOM | 6.3% |
| Gas System | Percentage |
|---|---|
| Mid-Length | 58.3% |
| Carbine | 25% |
| Pistol | 16.7% |
Builds in the community that include the SIG Sauer MCX Stock Adapter Kit
| Build | Parts | Total |
|---|---|---|
 | 30 | $6201.96 |
 | 31 | $6841.70 |
| 27 | $4029.87 |
 | 29 | $1715.48 |
 | 29 | $3997.53 |
 | 26 | $1094.10 |
 | 22 | $2256.53 |
 | 19 | $2790.81 |
 | 34 | $5532.17 |
| 19 | $3426.17 |
 | 37 | $4314.49 |
 | 25 | $1881.24 |
3 global ratings
SIG Sauer MCX stock adapter kit has a rubber butt pad that grips well to a shoulder or plate carrier. Mounts to the MCX receiver with the included hardware. Locks open and closed positively. Solid factory accessory for MCX builds.
adapter is precision machined, lockup against an MCX upper is tight with no play. swapped a few stocks through it without any wear on the adapter threads. sig spec quality
sig MCX stock adapter mates an MCX upper to a standard AR receiver extension via the adapter. cheek weld is comfortable for long range, QD socket on the rear is positioned correct for a sling pull
