Well as some of you may know I usually praise deep fire titanium pistons. I have them in several AEG's and until recently they have been great. However, lately I have discovered a flaw with them. On 2 occasions so far I had 2 piston bodies break. The problems seems not to lie in the metal gears but the plastic body.
Since these pistons have a full metal rack there is very little "meat" supporting that rack, in fact there is almost none right above the steel rack. The first piston broke as the steel rack was pushed up and broke the little plastic there is at the very end of the piston.
My second one broke in the side track for about 60% of the length of the piston.
This brings me to the second design flaw. The plastic is very cheap and brittle. Compared to a Prometheus piston witch has very solid polycarb body.
I have now installed a Prometheus piston and so far from what I can visually see they appear to be very solid and feature several metal teeth.
I really question the importance of having full metal teeth pistons anyways. As the sector gear engages the first couple of teeth the load from the spring is minimal, only later when more pressure from the spring is putting load on the teeth is having them metal matters. Tm pistons have only 1 tooth and they seem to last very long even at 400 fps as long as ROF is not trough the roof.
Anyways i'm officially off the Deep fire bandwagon and gonna wait a while before jumping in the prometheus bandwagon
