FN FN20-100041 AR‑15 5.56mm 16″ Barrel, Chrome‑Lined, M4 Feed Ramps (Barrel)
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FN FN20-100041 replacement AR‑15 barrel is a single unit (Package Qty: 1) listed with a 16″ length for 5.56mm, chrome‑lined chamber and bore, and M4‑style feed ramps (SKU FN20-100041).
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Description
Description
Product Overview
FN barrel FN20-100041 is listed under rifle accessories and shows as a 16″ AR‑15 style barrel for 5.56mm in the catalog title. Verified attributes include a chrome‑lined chamber and bore and M4 style feed ramps. Package Qty is 1.
Why this product
- Chrome lined chamber and bore — explicitly listed material/finish detail for the chamber and bore that buyers track when specifying replacement barrels.
- M4 style feed ramps — a defined ramp style relevant for compatibility with NATO‑style or M4 pattern upper receivers and feeding geometry checks.
Key Verified Specifications
- Brand: FN
- Model / SKU: FN20-100041
- Catalog title: AR‑15 5.56mm, 16″ barrel (as listed)
- Features: Chrome lined chamber and bore; M4 Style Feed Ramps
- Package quantity: 1
Appropriate Use Cases
- Ordering a single replacement or spare AR‑15 barrel specified as 16″ for 5.56mm where chrome‑lined chamber/bore and M4 feed ramps are required for parts records (source fact IDs: product-270437:f003, product-270437:f009, product-270437:f010).
What Customers Should Know
- This listing is for one barrel (Package Qty: 1); confirm barrel length and that the listed 16″ matches your receiver and legal requirements (source fact IDs: product-270437:f008, product-270437:f011).
- Use SKU FN20-100041 and brand FN when verifying fitment, threading, or other installation details with the manufacturer or armorer (source fact IDs: product-270437:f013, product-270437:f002).
Specifications
- Short Stroke Gas Piston Gas System (Rifle Length)
- 18.6″ Barrel Length ( Mid-Weight style, non-fluted)
- 1:8 Twist Rate Rifling

