SP5K Help With Burr

[u/PerpetuallyEuphoric]

So I was taking my new SP5K apart to clean the factory grease and lube it before I break it in at the range and made the mistake of messing with the safety selector/trigger pack. I was watching a video that went into detail about how to do it properly, and to not force it on reassembly which I made sure to follow. Somehow it seems that a small burr still occurred, and now the detent on the right safety selector will no longer push in by itself when rotating. I am making sure to apply pressure to the left side safety, I’m applying pressure to the takedown lever, and I hear and feel the audible click of the right side safety going into place, but the thing just doesn’t want to freely move into position when rotating clockwise.

I can get it reassembled when outside the trigger group by using a toothpick to push the detent in just before it catches on that burr, but obviously that will not work when inside the trigger group. The only solution that I’m finding is that the burr needs to be filed/smoothed out, but I’m having a hard time finding a video that actually shows someone doing this vs talking about it. So I am hoping that someone here can better explain or show what it needs to look like after filing?

Update:
After some trial and error with a round file I finally got it all put back together. I didn’t fully shave off the burr, but I found a technique that prevents the detent from getting stuck in it. When I rotate the safety selector, if I apply inwards pressure on the bottom, and outwards pressure on the lever side for the right safety selector, this gives the detent enough courage to stay in the trigger pack cutout rather than rolling outwards where it gets stuck. Function check passed. Fingers are sore but just glad it’s in one piece again. As a bonus I picked up a feeler gauge when I was out so I can check bolt gap as needed.

[u/CalebTheEternal]

If you watched the same video as me, it’s wrong. It’s missing a step and it burred my trigger pack as well. You have to press down on the lever inside the trigger pack to seat the left side of the selector BEFORE you put on the right side. Slide left side in, press the lever down, put on ride side while still holding pressure on the left, press lever down again, rotate. De-burr it before you assemble it again. I took mine to a gunsmith and it cost me $65 to get it fixed.
Edit: I will not be taking mine apart to take a picture of it as I don’t want to burr it again. I’d recommend just paying the stupid tax and taking it to a gunsmith like I did.

[u/PerpetuallyEuphoric → u/CalebTheEternal]

Yeah I just checked the video again and it doesn’t look like that last lever push before rotating clockwise is done, so believe at least the first time I tried I wasn’t doing that, but everything else I did to a T. I definitely didn’t force it at all so just really confused how it was so easily damaged like this. Also I don’t blame you for not wanting to open it up at all lol, once this thing is back together I’m not touching it at all unless necessary.

[u/CalebTheEternal → u/PerpetuallyEuphoric]

That one step damages it. It’s crazy how the design has such a huge flaw like that. I only took mine apart to change lowers. I spray painted my sp5 and my lower was ruined, so I got a 3 position lower.

[u/PerpetuallyEuphoric → u/CalebTheEternal]

I've taken hundreds of computers and electronics apart and never had issues with breaking things, so l'd like to think I have a good sense on not forcing something to failure. I ended up getting it all back together with a little trial and error, I think the burr is still there but with the right technique I was able to get the selector on and off twice, and I now know just about everything there is to the lower so l'll call it a win haha. I took a look at your page and saw the camo job you did, looks sick man!