Only two were built (W.Nr.111899 and W.Nr.170083). One of them (W.Nr.111899) was brought to JV 44 for a test sortie by Major Wilhelm Herget, but the cannon jammed. IIRC this aircraft went up in flames at Salzburg. The second Me 262 A-1a/U4 (W.Nr.170083) was the one captured by US forces, a third (incomplete) aircraft was captured by british forces.