The SLRs look nice, but there should be black lines separating the upper and lower receivers. Also, areas that have distinct 90 degree corners should be outlined in black per all Shipbucket conventions.
SLR/FAL handguards do not have any taper going forward as far as I know. They should have straight lines on the top and bottom of the handguards. Are you tracing these from photos, or from actual diagrams of the rifles?
Carry handles are different for all of the Commonwealth SLR variants. Only the late-style British SLRs with Maranyl plastic furniture ("pebble grain") have the style of rubber carry handle shown (I originally drew this back in 2008 for the first of the highly inaccurate Gunbucket "FALs"... I would recommend revisiting this part entirely
You should verify if all SLR bolt carriers have the "sand cut" machining marks (designed to remove fouling from the action) or not. I know the British rifles do for sure but not 100% on the Canadian and Australian examples.
Wood-stocked SLRs have steel buttplates
Only the late-style British Maranyl stocks have a rubber buttplate, which is noticeably longer than the steel buttplates on the early rifles. The steel buttplates are very similar to the type used on the SMLE.
Thanks for the feedback Colosseum, really appreciate it!
The black line between the upper and lower receiver is something I've been debating about myself so glad that clarify that for me. Also, I would like to ask, what do you mean by the distinct 90 degree corners? Does this mean that all 90 degree corners have a thicker line or something?
As for the rest, the L1A1 do have a slight taper but only on the bottom of the handguard according to the blueprints I've seen. I am tracing it from a photo and look through some blueprints but most of the details come from a photo that I have.
In regard for the carry handle, that plastic one seems to be present in the C1A1 and both Australian and British L1A1. The C1A1 do have a different style of wooden carry handle but they're quickly replaced by the plastic one according to Forgotten Weapons. Pictures of Australian L1A1 have the plastic style but there might be earlier ones that I don't know about. At any rate, the 2008 inaccurate "FAL" seems to have some accurate parts but I will try to revisit this.
The sand cut machining mark seems to be present in British and Australian L1A1 but the Canadian C1A1 doesn't have them from what I can gather.
About the wood stock with the steel buttplate, I am embarrassed to say that I've missed this. I will fix that, thanks for pointing it out for me.
In any case, I will try to get some blueprints and more photos to work with to fix the British L1A1. Once again, thanks for the feedback!