Description
Razor · SKU 556-13.9M-17-M4-NP · 13.9? Government mid · 4150 nitride
13.9? Government mid. Keymo pin-and-weld length.
RAZOR 13.9? Government mid-length, 1:7, 5.56 NATO, 4150 CMV, black nitride. Produced in house in Florida from raw bar stock: drill, ream, rifle, contour, and assemble on a fully automated, robotic-driven line. Stress-relieved after rifling. Quality control holds every bore inside its individual tolerance. 100% USA made. Weight 23.8 oz. Sub-1? MOA guarantee.
Short barrel until it is pinned
A 13.9? barrel is an NFA short barrel until a pinned-and-welded muzzle device brings overall barrel length to 16?. Dead Air Keymo is the usual mate. Journal is .750?.
Product Overview
Bar stock to finished tube
Produced in house in Florida from raw bar stock: drill, ream, rifle, contour, and assemble on a fully automated, robotic-driven line. Stress-relieved after rifling. Quality control holds every bore inside its individual tolerance. 100% USA made.
4150 CMV + nitride
4150 chrome-moly vanadium under a black nitride surface. Nitride hardens and protects the bore and exterior without a chrome lining. Not a CHF chrome-lined duty tube.
Gas system is this SKU
Mid-length gas on a 13.9? is not a 14.5? mid or a 13.9? carbine. Match the gas block to the .750? journal.
In-house QC
13.9? mid-length. Journal .750?. M4 extension. Extensions torqued after nitride.
Specifications
| Component | Specification |
|---|---|
| SKU | 556-13.9M-17-M4-NP |
| Platform | AR-15 / M16 |
| Length | 13.9? |
| Profile | Government |
| Material | 4150 CMV Mil-B-11595E |
| Finish | Black nitride |
| Chamber | 5.56 NATO |
| Gas system | Mid-length |
| Gas block journal | .750? |
| Twist | 1:7 right-hand |
| Barrel extension | M4, torqued after nitride |
| Weight | 23.8 ounces |
| Accuracy | Sub-1? MOA guarantee |
| Origin | 100% USA made |
Confirm gas-block ID against the .750? journal. Pin-and-weld is a separate service (SKU PW). Keymo on 13.7? / 13.9? makes 16?.
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