![13 mm Gyrojet, Three Nozzles/Ports? - General Ammunition Discussion - International Ammunition Association Web Forum 13 mm Gyrojet, Three Nozzles/Ports? - General Ammunition Discussion - International Ammunition Association Web Forum](https://global.discourse-cdn.com/business6/uploads/cartridgecollectors/optimized/3X/3/8/38b281d2ebf9bbaa90d4f7198f73e65bed26aea1_2_689x415.jpeg)
13 mm Gyrojet, Three Nozzles/Ports? - General Ammunition Discussion - International Ammunition Association Web Forum
![13 mm Gyrojet, Three Nozzles/Ports? - General Ammunition Discussion - International Ammunition Association Web Forum 13 mm Gyrojet, Three Nozzles/Ports? - General Ammunition Discussion - International Ammunition Association Web Forum](https://global.discourse-cdn.com/business6/uploads/cartridgecollectors/original/3X/9/8/980cfa2f6bafa3443a5c1825a574c6a4921c2b2b.jpeg)
13 mm Gyrojet, Three Nozzles/Ports? - General Ammunition Discussion - International Ammunition Association Web Forum
![MBAssociates Gyrojet pistol, carbine and rifle - Fired 12mm or 13mm rocket projectiles. Turned out to be a commercial failure. Unfired rounds (if they can be found), can cost as much as MBAssociates Gyrojet pistol, carbine and rifle - Fired 12mm or 13mm rocket projectiles. Turned out to be a commercial failure. Unfired rounds (if they can be found), can cost as much as](https://preview.redd.it/s7m68srs9kf61.jpg?width=640&crop=smart&auto=webp&s=811581a2d72cfacf2a23365d00e844e738a5ff80)
MBAssociates Gyrojet pistol, carbine and rifle - Fired 12mm or 13mm rocket projectiles. Turned out to be a commercial failure. Unfired rounds (if they can be found), can cost as much as
![A Gyrojet Mark II mod. C rocket pistol Cal. 12 mm Gyrojet, no. 247. Bright 2-groove rifled bore, length 5". Total length approx. 9-1/2". Integrated magazine for six rockets. On left side A Gyrojet Mark II mod. C rocket pistol Cal. 12 mm Gyrojet, no. 247. Bright 2-groove rifled bore, length 5". Total length approx. 9-1/2". Integrated magazine for six rockets. On left side](https://c8.alamy.com/zooms/9/8a1006f21017439eb4fd2fc6acf17fd4/t8nphy.jpg)