NO ,
The C3 is basically a Parker Hale TX1200 target rifle with a repeater floor plate ( ie a M82 ) , and uses a wood stock , basically a Mauser M98 with out the thumb cut out on the LH side , & uses a Kahles ZF69 6x sniper scope , barrel tunion std Mauser .
The C3A1 is basically a Parker Hale M87 ( Police/Marksman rifle ) , in a wood TX1200 target stock , and a semi enclosed square top Mauser actionw/std tunion lenght , & special Unertl designed steel mount for Unertl 10x sniper scope , mags are long action size .
The Parker Hale M85 has a number of special features over the M82 & M87 , it has a enclosed squaretop Mauser action , and has a longer barrel tunion to better support having a heavy barrel fitted ( this feature is now a std thing , back in the early 80s it was anything but std .
Has a special 2 stage trigger , which is fantastic , runs modied 10rd M14 magazines , ie double stack/feed .
Had back up irons , before they where trendy , and had a PH designed wood stock ( mainly for prototyping & use on the M87 Police/Marksman rifle ) , and this shape was made in fibreglass by McM ( most M85s have Fibreglass stocks made by McMillan , McM still make the stock & its called the McHale ) , colours are , solid black , solid green , 3 colour camo ( USMC ) , and desert camo .
The M85 used Swaro fixed 6x & 10x sniper scopes of the period , ie mid 80s etc , not MST-100s .
I have 2 rifles that use MST-100s , a M40A1 build thats almost done , and my C3A1 clone ( Parker Hale M87 ) .
So in short the M85 is very special & quite a bit different from all other Parker Hale rifles , its a shame they only made a few before the company closed its doors .
Later Chris