A better transfer port seal
Posted: Tue Sep 19, 2017 3:04 pm
Another 'discovery' that everyone else probably knows about already - you can use a standard M4 nylon washer as a replacement for the sub-12 S400/500 transfer port seal.
They are a nominal 9mm OD which is minutely too big, but it only took a couple of minutes with a nailfile to resize to a push fit into the upper machined seating and then I had a transfer port seal for my HFT500 that doesn't move when I take the gun apart or put it together, and should last for ever - unlike the original 6x1 o-ring. There is no trace of air blast with the tissue paper test, so although I'm not going to take my S400 apart specially, I will definitely do the same next time I'm in there.
Hope this helps.
Alan
They are a nominal 9mm OD which is minutely too big, but it only took a couple of minutes with a nailfile to resize to a push fit into the upper machined seating and then I had a transfer port seal for my HFT500 that doesn't move when I take the gun apart or put it together, and should last for ever - unlike the original 6x1 o-ring. There is no trace of air blast with the tissue paper test, so although I'm not going to take my S400 apart specially, I will definitely do the same next time I'm in there.
Hope this helps.
Alan