The problem with the type-10 trigger mech is not only that the sears wear down quickly but also because it uses what's called a 45 degree system. Because of this the second sear sits at a 45 degree angle, and is perpendicular to the piston.
.......... _________/| <--- piston
..........|_________ |
......................./ \|
.....force ----> /
..................../ <--- this line is the piston sear
When you pull the trigger it pushes the second sear against that back part of the piston until it slides off and the cylinder is released. This causes the sear to chew through the piston. When you put in a heavier spring this accelerates the process. If you got new sears they would still be damaging your piston, not to mention with a 45 degree trigger mech and high power springs, the trigger pull can get a little heavy. What you need is a 90 degree trigger mech.
I believe this is how they work but, so someone correct me if I'm wrong, I've never had the chance to take one apart (yet
).
(90 degree mech uses a different style of piston)
.............................._
.................________l. l
................|________. l<--- Piston
............................l l_l
..sear flips down<---l
............................l<--- This line is the piston sear
......pivot point---> O
I don't know how the other sears are placed to keep the sear on the piston from flipping down, but when it does flip down, there is no contact with the piston as it falls, and the piston flies forward freely, allowing a light trigger pull (once again I may be wrong). 90 degree trigger systems are the zero trigger, the V-trigger, and the M-trigger. Well those are the ones I know of anyway. I believe there was a another one made somewhere, but I cant remember where it was. It's in there somewhere on noobies M-trigger thread on ASR.
Sorry about the crude drawings, but I hope that helps!
As a final note from what I have heard about laylax springs is that as you use them they shrink to a much shorter length whereas I haven't heard of PDI springs having this issue.
P.S. Periods mean nothing (in the "drawings") and are placed so "unused spaces" aren't deleted.
.......... _________/| <--- piston
..........|_________ |
......................./ \|
.....force ----> /
..................../ <--- this line is the piston sear
When you pull the trigger it pushes the second sear against that back part of the piston until it slides off and the cylinder is released. This causes the sear to chew through the piston. When you put in a heavier spring this accelerates the process. If you got new sears they would still be damaging your piston, not to mention with a 45 degree trigger mech and high power springs, the trigger pull can get a little heavy. What you need is a 90 degree trigger mech.
I believe this is how they work but, so someone correct me if I'm wrong, I've never had the chance to take one apart (yet

(90 degree mech uses a different style of piston)
.............................._
.................________l. l
................|________. l<--- Piston
............................l l_l
..sear flips down<---l
............................l<--- This line is the piston sear
......pivot point---> O
I don't know how the other sears are placed to keep the sear on the piston from flipping down, but when it does flip down, there is no contact with the piston as it falls, and the piston flies forward freely, allowing a light trigger pull (once again I may be wrong). 90 degree trigger systems are the zero trigger, the V-trigger, and the M-trigger. Well those are the ones I know of anyway. I believe there was a another one made somewhere, but I cant remember where it was. It's in there somewhere on noobies M-trigger thread on ASR.
Sorry about the crude drawings, but I hope that helps!
As a final note from what I have heard about laylax springs is that as you use them they shrink to a much shorter length whereas I haven't heard of PDI springs having this issue.
P.S. Periods mean nothing (in the "drawings") and are placed so "unused spaces" aren't deleted.