Produced in house by FN for use on the FAL and FNC rifle. It is a 4x28 scope that shows clear influence from the ZFK 43-1. Unlike the ZF G3 which also descended from the ZFK43-1 the FN 4x28 keeps the elevation dial on right side of the scope, but swaps the side mounted focus knob for a screwing in/out occular lens for focus.

Images



On FN FAL with Brazilian troops.



On FN FAL with Venezuelan troops.















Reticle.






BDC Variants

The elevation dial appears to be marked out to 600m on all versions.

Blank (7.62x51)

92 (5.56x45)

100 (???)

109 (5.56x45)

SS109 (5.56x45)

Serial Numbers

Serial	FAL/FNC	Images	Notes
1499	FAL	2 3 4
1731	FAL	2 3
2330	FNC	2 3 4 5	Probably Belgian army surplus. On FNC mount. BDC marked "SS109".
2335	FAL	2 3 4 5 6 7
2377	FAL	2 3 4
2417		2	On a FNC mount but can't see both sides of BDC dial.
2495	FNC	2 3 4 5 6 7 8 9 10 11 12 13 14	Came from a Turkish surplus exporter. Glass is hazy. BDC marked "109".
2502			On a FNC mount but BDC dial is hard to see fully.
3919	FNC	2 3 4 5 6 7 8 9 10 11	Probably Belgian army surplus. On FNC mount. BDC marked "SS109".
3847	FNC	2 3 4 5	Probably Belgian army surplus. On FNC mount. BDC marked "SS109".
3864			BDC dial appars to be marked "100".

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