Aluminum is not full auto or bump fire rated. HANCOCK - 14.5oz - Recommended for sub sonic only & low rate of fire
Titanium can handle full auto or bump fire for a limited time/one magazine before cooling. HANCOCK - 19oz - Recommended for all types of ammo
Stainless is full auto or bump fire rated but also for a limited time/two or three magazines before cooling. HANCOCK - 29oz with titanium baffle.
These are conservative numbers and can vary based on load, barrel length, suppressor size and speed of magazine swaps.
As time progresses we will publish the limits we find. See FAQs for more information.