In addition, the thumb safety on the Star BM blocks the hammer, whereas it blocks the motion of the sear on a 1911 and the Star's trigger pivots on a roll pin rather than moving straight back like a 1911A1's trigger to trip the sear.

At approximately this same serial number a few other shortcuts were used to expedite production – a shorter rollmark/slide legend, coarser polish limited to the side of the slide and frame, and all the small parts were given a bead blast matte finish.

Most imports in the US are arms that were traded in by various Spanish military branches to Star for exchange for newer model 28/30M and 28/30PK pistols.

Spain's Guardia Civil used BM's up through about 1990 or so as did many other police agencies in Europe and Latin America.

The US-based gunsmith Timothy F. La France, the principal of LaFrance Specialties (formerly of San Diego, California) used the Star BM pistol as a basis to manufacture a sub-compact custom pistol called the NOVA 6-Pack, basically a Star BM shortened to pocket-size; the NOVA 6-Pack was manufactured only under custom order in a very small number of samples, and was, at one time, the smallest 9mm handgun in the world.