Is that an Ares gearbox with the EFCS ECU bollox ???
I thought the box was an APS or did the bloke fit an Ares magnetic thingy in there
or is the box an ares v2 - I dunno, a right pile of confusion going on as to wtf it all is
if so the sector has a magnet to detect its position & stuff
so you had to (of a sort), keep the Ares sector
which the 18:1 & 16:1 sectors are same
thus the bloke plopped in a SHS 16:1 spur
and "likely" kept the CA sector with the magnet in one of the holes
The washer behind piston was to likely correct AoE a bit more
as the silent/mushroom piston head & matching cyclinder (if used)
would make it difficult to adjust with sorbo/normal rubber pad
the silent head has a little tiny squish to it anyway - so adds so impact resistance
so bloke probably thought - fuck it just add a slight spacer between piston & PH
to correct AoE - though tbh them piston heads are quite chunky on their own
and I found they seem to PARTIALLY correct AoE anyway
I don't use them as I feel the vents in PH don't allow the o-ring to push out like other PH's
but others use them, they don't muffle quite that much, they offer a tiny bit of impact cushion
(but not a massive amount)
Looks to be a SHS piston & I do not like those pistons...
way too little actual rails for my liking - I like nigh on full solid rails
(especially in "windowed" boxes, just my own personal OCD I guess)
but too little actual rail on those SHS pistons for my liking
even the swiss cheesed pistons...
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I only like to use them is say a G&G non-windowed box
where box has uninterupted rails so to speak
but that SHS piston...
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nah not got one, nor do I intend to get one for lack of rails
(soz but absolutely shit way to lighten a piston imho)
Another thing with SHS pistons...
They BIND - quite often in numerous boxes
Except for G&G's, most boxes will need a little sanding to stop SHS pistons binding
especially at full retraction on the last couple of teeth I found
So just something to be aware of
SHS pistons bind in APS...
As I said, some money had been spent on this gun at some point
but think it was assembled by an inexperienced tech or a few bad techs have had a go at it
A good result you getting refunded some money to help fix the issues
some of things I can understand as to perhaps this/that was performed
but above all else palming off a botched gun onto somebody I can not get my head around
good result all round, should finally get the gun you wanted/deserved at last