Quote:
Originally Posted by Floreos
I have a all stock marui g17 I am using propane with that I am trying to preserve as much as possible.
I've been told the front post will blow up eventually, so to stop that i have filled the empty space around the post with JB weld flush so the safety is still working.
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Are you saying that you have done it already or that you intend to do that?
In theory it's sound but the problem isn't the area around the post that will prevent it from breaking but the actual post itself. The screw threads aren't very thick and they don't go very deep into the frame itself.
Typical TM front post screw on left, my personal aftermarket m1/m2 screw on the right:
There's a hell of a lot of real estate where the screw is but TM designed it to be shallow for some reason. Making it deeper will make the screw act like an anchor and send more of the energy into the frame itself rather than the post. Notice how in this post, all of them crumble and separate into pie fragments:
http://www.airsoftcanada.com/showpos...&postcount=112
Drilling the hole and filling it up w/ jb weld with a better screw is still experimental so I would actually advise against it unless you are super rich or don't mind trying it on a broken gun anyway.
What you could also do is use loctite or jb weld on the screw itself inside the hole so that it will sit permanently flushed as 1 piece into the frame. When the front post braces for impact from your slide's recoil it will pull on the chassis of the gun which tugs on the screw and that unleashes force onto the front post. By filling in the gaps of the front post you make it so that you're pulling on the whole front of the lower frame instead of just the post. Filling the surrounding area will only protect the surrounding area of the post from being pulled away. There is now a greater risk of the front post's screw threading to be pulled away along with the post.
Pic for reference of typical px4 frame failure:
You will need to put JB weld inside as well as outside the post to make it more secure. Doing this will undoubtably make it more difficult for future repairs and replacements.
Also don't get oil or any kind of lubricant on JB weld. That stuff seems to make some plastics swell and JB weld might also react to it.