Lantac has just introduced their own spin on a ratcheting castle nut and end plate combo that does not require the end user to stake the castle nut. The Lantac system uses a castle nut with pretty aggressive teeth machined on one side that faces towards the end plate which engage with a tooth on the end plate that is under spring tension. These two lock together for a setup that cannot vibrate loose which is why you don’t have to stake it.
The Lantac RPS, Ratchet Plate System removes the necessity to stake castle nuts in place after fitting. It also provides a QD Sling attachement point directly below the buffer tube. It utilises a one piece designed ratched tooth and arm, machined directly into the anti rotation plate itself.
The enhanced castle nut has an aggressive grip pattern and radially machined groves that register with the spring like arm and tooth on the plate, causing the nut to be retained in place. The nut cannot vibrate loose through firing but can be removed through the use of an armourers wrench if necessary. The teeth and groves are all internal when fitted together so they cannot be accidentally damaged. lighter weight with additional functionality over the standard original design.
I spoke with Brett at Lantac today and he said these are currently in production so look for them to be available for purchase soon. I unfortunately could not nail him down on a price or exact release date.