Their default abilities are Impact Grenade, Sentry, and Combat Shield, though they can be swapped out and/or upgraded with Ability Cards. Their standard issue blaster is the FWMB-10, but they can also wield the DC-15LE, FWMB-10K, and the TL-50 like all Heavy units.
Gallery
In-game hologram of the First Order heavy assault stormtrooper.
A heavy assault First Order stormtrooper at Maz's Castle on Takodana.
A heavy assault First Order stormtrooper in sentry mode in The Graveyard on Jakku.
A First Order Heavy Assault Stormtrooper on Takodana.