This video details a modification made to a Deep Fire AT4 40mm launcher, converting its bore from 57mm (2.25 inches) to 38mm (1.5 inches). The primary goal of this modification was to enable the use of Milsim Labs M29 40mm foam rounds. The presenter highlights significant performance improvements, including increased range and accuracy, achieved through the optimized barrel system. Before the modification, a 60mm round achieved a 200-foot range with 15-20 feet of target zone at 30 degrees elevation. Post-modification, the launcher achieves 225-foot accuracy with a vehicle-sized target at only 10 degrees elevation, and can reach over 300 feet with 30 degrees of elevation.
This video features a review and testing of MilSim Labs M29/M385 40mm foam rounds used in conjunction with a Lancer Tactical EGLM launcher and S-Thunder shell. The reviewer highlights the high performance of the rounds, especially considering the short-barreled launcher. Links to the launcher and shell reviews are provided in the description.
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