I've often thought that about them. An underlever based on the Cadet would have made a brilliant kids gun. The Merlin is more in size and weight to a Webley Junior.Originally Posted by Hsing-ee
Anyhow--I had a look at one for somebody yesterday and it was different to the others I've seen. This had a double hook coil spring for the trigger. One end hooks on the safety sear spring and the other on the front of the trigger. The others I've seen have had a hairpin type (flat or round) that goes behind the trigger. I've only seen Mk2 versions with the separate rear sight, rather than on the transporter/loading tap, but I have seen 3 trigger spring types and both trigger guard types, which shows again that BSA used up old spares on new models if they could.
On the one I looked at yesterday the transporter base/ O ring and spring (bent washer) were out of the gun and the transporter/loading tap would not go into it's housing due to the gun having been repainted. I cleared the paint before trying the transporter/ loading tap. Then the little washer goes into the hole in the end of the cylinder with the pointy bit facing outwards and the transporter base and O ring go on top of that with the O ring facing the transporter/ loading tap. It does a pretty good job of stopping the tap coming up too far and falling out. I'd guess people have either forced the taps out over the years or that little spring/washer loses some tension.
On the one I did yesterday, it had had a new mainspring fitted, which if it had been my gun, I would have collapsed a couple of coils. However the face of the cocking arm and the piston were good so it should be ok.
DO NOT TRY TO TUNE THESE GUNS! They are fragile and the cocking arm can slip off the piston and due to the design the action wants to lift itself out of the stockresulting in a broken fore end
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As if by MAGIC. 
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