This is getting very frustrating trying to make anything for the FX air guns. I was given the size to make an LDC for an owner of an Impact, 27mm x 1.25, he said it fit perfectly. So I have been making them that size for Impact owners, today I get an e-mail, the threads are too big, FX has now used yet another size of thread on the Impact, I would like to know what on earth is going on at FX, why are they constantly changing the thread size and pitch on the ends of their guns? It is bad enough having to deal with this on the Wildcats, but now makers have to deal with different threads and pitches being used on the Impacts, come on FX it is time you used a standard size threads on your shrouds. Is there an Impact owner out there who knows what this other thread size and pitch is? It looks like it might be 26mm threads and not 27mm but I have no idea what the pitch is, Neil.