The M829A4 is a fifth-generation APFSDS-T cartridge using a depleted-uranium penetrator with a three-petal composite sabot; the penetrator includes a low-drag fin with a tracer and a windshield and tip assembly.[12] Its propellant maintains consistent muzzle velocities across operational temperatures from −25 to 145 °F (−32 to 63 °C). The new Advanced Combustible Cartridge Case is similar to previous models but has a relocated skive joint placement for better crew-member safety during handling. The initial order for 2,501 M829A4 rounds in 2014 had a unit cost of $10,100 each.On 20 July 2015, Orbital ATK announced that the M829A4 had passed First Article Acceptance Testing and was entering production.On 12 October 2015, Orbital ATK announced the round had recently received type classification as the M829A4 and was awarded a full-rate production contract to begin in early 2016.
Parameters of each type of bullet
The M829A4 APFSDS-T round, with depleted uranium penetrator and programmable fuze, pierces 800mm+ RHA at 2 km-ideal against Russian T-90s-while the new M1147 AMP (full-rate production approved January 2025) combines HEAT, MPAT, canister, and obstacle-reduction in one, boosting logistics for Ukraine’s 31 M1A1s (22 lost per Oryx). This amps up Abrams’ urban punch, but drone vulnerabilities (e.g., FPV strikes) highlight the need for APS upgrades. A timely boost for Kyiv’s push-raw power meets modern grit!
https://www.reddit.com/r/TankPorn/comments/d5a5ap/cutaway_of_the_m829a4_apfsdst_round/?tl=vi
