Probably took the Armourer ages to get the parts, used to have a loads stashed in the armoury, now it's indent for every part rather than, "Gizzus 20 of them, 30 of them, a bag of them and a few handfulls of that!" Crap system!
It's all costings now! The is a little retraction 'nut' for a weapons pylon on the Tornado GR4 called a 'inhibitor'.It's just a casting of a nut with one end closed over & a long pin in the center.You screw the nut onto the holding bolt & the pin retracts the locking spigots,allowing the bomb release gear to be remoed.
Anyway,My old Sargent ordered a few & he got a mixed bag,some from a German maker & some from a well known British plane maker.
The cost of the German ones were a hell of a lot cheaper than the British ones & when he queried the price,he was basically told thru channels to mind his own business by the British supplier!
If there were any serious problems with the A2, you can guarantee that the pages of Arrse would be awash with angry posts about it!
The only problem that I'm aware of since the A2 was introduced is that the A2 mod didn't initially sort out the old problem of safety catches jamming in dusty conditions. When this became apparent (again!) in the sandbox, the IPT hurriedly gave H&K a contract modification for a new catch made from a harder material. This has apparently solved the problem and I believe that all current issued rifles have this mod.