I’ve had good and not so good L&R’s. As for coil spring production locks, I have several TC flints, I shot one for 20 years, thousands of shots. Replace one frizzen in all that time. No internal parts. Several barrels, though. Very fast with minimal polishing/tuning. Even made a interchangable flint to percussion using a TC percussion lock in one heavy offhand rifle. Just notched the lock plate for a drum. Off the sticks, I’ve shot numerous possibles at 50 and several at 100yds with it. Very fast ignition, short throw and good spark. Great value. Try doing so before spending big money on a RPL lock. The money you save can get you a long way towards a decent barrel.