Clear im not sure about,black "were" std in timmys,not sure on the new ones,but blue are the extra hard,make sure you have a bolt with detent gaps in so the bolt can slide past easly cos other wise it slows the bolt down go back and forth!
Budgie you sound like you got it sortted,might even have a set off you for my 2k2 if you have one you could sell for my finest bread,