This listing is the SIG Sauer SIGM400 PRO complete upper receiver in 5.56 NATO with a 14.5-inch barrel. This listing is for this 14.5-inch 5.56 NATO upper only.
The upper is a drop-in SIGM400 PRO assembly for a compatible AR-15 / M400 lower. It is chambered in 5.56 NATO. The 14.5-inch barrel uses a 1:7 twist and 1/2-28 muzzle threads with a SIG flash hider-compensator. The operating system is direct impingement with a SIG Micro-light gas block. A free-floating M-LOK aluminum handguard is fitted. The receiver finish is black anodized. The complete upper includes the bolt carrier group and charging handle.
This listing is the SIG Sauer SIGM400 PRO 14.5-inch 5.56 NATO complete upper only.
- Manufacturer: SIG Sauer — SIGM400 PRO complete upper 5.56 NATO 14.5 in, SKU WUAM400-14B-PRO, UPC 798681645060
- Caliber / barrel: 5.56 NATO; 14.5 in; 1:7 twist; 1/2-28; SIG flash hider-compensator
- System: direct impingement; SIG Micro-light gas block; free-float M-LOK handguard
- Finish / contents: black anodized; bolt carrier group and charging handle included
- This listing: this 14.5-inch 5.56 NATO SIGM400 PRO complete upper only
- This item is restricted to LE / MIL / first responders only.
Internal Reference:
WUAM400-14B-PRO
Barcode:
798681645060
| Brand: Sig Sauer |
| Model: M400 |
| Caliber: 5.56mm |
| Part Type: Upper Receivers |
| Barrel Length: 15" |
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