22+ F-16A Block 15 Gif. Belgian air force block 20 mlu. Production blocks 1, 5, 10, 15 (enlarged horizontal stabilizers) and 20.

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Block 15 was the first phase of the msip effort, and was also referred to as msip i. The major visible change was a new tailplane that featured a rear extension. The block 20 can be distinguished by the birdslicers.

The last one was delivered in 1996 to thailand.

These initial aircraft were externally identical as the production improvements were mostly internal. The last one was delivered in 1996 to thailand. Older style thin wheels (recognizable as they have not so many vent holes). Block 15 was the first phase of the msip effort, and was also referred to as msip i.