Having not long de-greased the RBA mags, after spending 24hrs in the old JIZER tank,there are a couple of observations i would like to make.
1. The RBA phosphate finish is much rougher than the LITHGOW or ELECTROLUX magazines.
2. The phosphate finish also appears to be less resistant to abrasion, and is much blacker in colour compared to LITHGOW&ELECTROLUX mags
3. The LITHGOW bottom plates have been also in the same RBA phosphate dip.
4. At this moment, after stripping down 16 RBA mags all the sub components are LITHGOW supplied. This suggests that RBA only made the mag body so the articles quoted saying RBA made BREN magazines is not quite correct, they only made one component and did a lot assembly with the LITHGOW supplied parts. This may change as i have only looked at a small sample (16mags) so if anyone on the forum finds any RBA mag components other than the mag body, I would like to know