MBA Gyrojet
Official wording
MBAssociates (MBA), Gyrojet Rocket Guns, cal. 13mm, semiautomatic version only, produced in 1968 or earlier, S/N ranges A0001-A0032, A001-A085, B010-B411, and B5059-B5692.
What this entry requires
- ATF REQUIRESConfigured as the ATF wording states: “semiautomatic version only”
- ATF REQUIRESYour serial number is one ATF listsATF: “S/N ranges A0001-A0032, A001-A085, B010-B411, and B5059-B5692”
- ATF REQUIRESMade 1968 or earlier (ATF’s dates)ATF: “produced in 1968 or earlier”
Editorial facts · Our research
Source
- Official wording
- ATF P 5300.11, April 2025 edition · Section III · PDF p. 43 ↗ · ATF original ↗
- Entries
- 1 line
- Verbatim check
- Checked against the PDF text before every release
- Editorial facts
- Confidence: Medium · Last revised 18 October 2026 (Evidence pass) · How we rate confidence
- References
- 1. americansocietyofarmscollectors.org ↗, type
- 2. americansocietyofarmscollectors.org ↗, years (estimate: partly supports it)
- Fact tags
- ATF the ATF wording states it.
- REF ¹ an outside reference supports it; the number points to the list of references.
- ESTIMATE an approximate or indirect reading, for example the production range of the base model.
- NO CITATION we haven’t attached a reference for this fact; it’s our editorial reading, not ATF’s.
- Source checked
- 20 October 2026: ATF’s page still lists the April 2025 edition
- Corrections
- None
Historical context
Image: Wikimedia Commons, “Gyrojet pistol.png” by Advanced Research Projects Agency, Public domain. Retrieved October 2026.
Summary: Wikipedia, “Gyrojet”. Text CC BY-SA 4.0.
FROM WIKIPEDIA
The Gyrojet is a family of unique firearms developed in the 1960s named for the method of gyroscopically stabilizing its projectiles. Rather than inert bullets, Gyrojets fire small rockets called Microjets which have little recoil and do not require a heavy barrel or chamber to resist the pressure of the combustion gases. Velocity on leaving the tube was very low, but increased to around 1,250 feet per second (380 m/s) at 30 feet (9.1 m). The result is a very lightweight and transportable weapon.