The M1665WC (M1665) is a 6% M reloadable composite motor from Gorilla.
| Average Thrust: | 1,548.3370 N | 
| Certified By: | Tripoli Rocketry Association | 
| Class: | 6% M | 
| Delays: | |
| Designation: | M1665WC | 
| Diameter: | 75.0000 mm | 
| Length: | 785.0000 mm | 
| Letter: | M | 
| Manufacturer: | Gorilla | 
| Name: | M1665 | 
| Peak Thrust: | 2,268.5900 N | 
| Propellant: | APCP | 
| Status: | Out-Of-Production | 
| Thrust Duration: | 3.4900 s | 
| Total Impulse: | 5403.6963 Ns | 
| Total Weight: | 5620.0000 g | 
| Type: | Reloadable | 
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