Sterling L2A3 Wrinkle Finish Paint

[Peter Laidler]

I would think that being early Mk4 (L2A3 type) single shot Police Carbine guns Sterling were using up the last of their Mk3 (L2A2 type) trigger mechanism assemblies. In fact, the FIRST Police Carbines were based on late Mk3 (L2A2) guns The later and 'naughty' Mk4 rock and roll trigger mechs are a direct fit. But you must promise to replace the full auto inner change lever with the existing neutered inner from your existing trigger mechs.

The same applies to the magazine catches buttons and adjustable foresights. I expect these are plentiful via the US and in parts kits

Information

Warning: This is a relatively older thread This discussion is older than 360 days. Some information contained in it may no longer be current.

[lima]

But you must promise to replace the full auto inner change lever with the existing neutered inner from your existing trigger mechs.

Yes already have that covered, original semi change levers are hard to find, I do have one new original one in an original NIW MK6 trigger pack i was lucky to find. Using that as a pattern, I machined a new single shot change lever from scratch. It works just fine but I realized that modifying the FA ones is slightly easier. A bit metal in the right place held with high temp silver solder brazing does the job and then some quick parkerizing. Attached are pics of a few I modified.

After playing around with some various trigger frames, the one thing that I did not expect is that the triggers geometry is different (not just the finger shape) between the MkIII and MKIV triggers. The MkIV trigger does not want to sit nicely in a MkIII trigger frame with the sear cradle installed.