Disassembly and Reassembly of the M18 Sig P320 

Thank you for watching!

Man first time i did a take down and reassembly and i saw the guide rod stick out the front my stomach dropped out my ass! I thought i broke it 😂😂😂😂

Thank you for watching and leaving the comment. I truly appreciate it. I always try to respond sooner but youtube oddly doesn't update me very quickly anymore. It took me almost a week to find a video on it. But all of them went through a history lesson first for like 20min and jabbed it in there hap hazardly somewhere randomly. Thank you again!

Thank you! Np. I can't wait to make more videos regarding this stuff. Right now, I'm a Drill Sergeant with dang near zero time to make any.

Thank you, I'm glad it helped. I was stumped as hell the first few times and had to dig in the manual for the 1st time in a while, lol. Happy Shooting!

Yup, exactly why I here, wtf man.😅

I also was baffled as to why I couldn't put mine back together and lock the slide.....soon as he said about the ovals I was like well.....I'm an idiot

This PST unfortunately is PAAAAAAAIN to disassemble in a few details e.g., TAKE DOWN LEVER

Same here. Did a quick field strip after my first shoot and it went back together fine. About blew a brain gasket the next time.

You guys are very welcome. Thank you for taking the time to comment and sub. It's greatly appreciated!

You're welcome, me too. Lol

Thank you! Same thing happened to me is why I made this. Thank you for supporting my channel.

Thank you for watching and taking the time to comment!

Thank you! I appreciate you watching and leaving the comment. Sorry I don't have anything up lately. The past few months have been nuts between airborne school, the field, drill school coming up and the holidays as well as a move. Once I get settled up here I'll get out for some more videos though.

Np! Thank you so much for taking the time to watch, comment and subscribe. I truly appreciate it. I can't wait to make more videos but I've been running around like a chicken with its head cut off for the past year.

Thank you for your support and for taking the time to leave a comment! I really appreciate it.

Your absolutely welcome. I'm happy to see that this video has helped so many.

Np at all! Really happy this video is helping so many. I truly appreciate you taking the time to subscribe and comment.

Np, glad it helped. It was an all day event for me to find a video that explained it is why I made this one. I appreciate you taking the time to leave the comment and sub to the channel.

Np. Glad it helped and thank you very much for stopping to leave a comment. It's been a long time since I have pushed a video out due to the insane amount of work being a Drill Sergeant. But this video is pretty much carrying my channel right now and I can't wait to make more.

Thank you so much for the sub and comment. I definitely love the pistol. I just got a TLR8-G for it. I got the Wilson Combat grip but had some troubles during the order process, and by the time the order worked, I forgot to hit the manual safety cut selection. I'm thinking I will go with gray guns though. I completely agree with you. I'm definitely not an expert, but I know it's best to keep things as simple as possible. I'm about to scour Google to see if there is an answer of why the guide rod has to be an oval.

Your welcome! Glad to see this video helping so many. Thank you for taking the time to leave a comment here.

I truly hope it helps. I love this pistol even with the little quirks. Watch the rest of the videos with some of the modifications. They have turned this thing into a little animal. The Griffin ATM barrel I think makes this thing look awesome.

Thank you for the comment bro. I'm really happy to see this video helping so many people.

You are very welcome, I had fun making it.

Thank you for watching, and subscribing and also letting me know it helped. Glad to see that it is helping so many people!

Np brother. It's kind of got a few quirks but I really like it.

I have seen multiple things on if you should or should not. From the APEX trigger install video, directly from APEX talks about it. And since I have been doing it this way. I have not had a single issue with the pistol. I am not just letting it slam forward on empty all the time. I can't imagine the few times I do it per year after cleaning, it would cause any amount of damage.

Also thank you so much for leaving your comment. I truly appreciate the time you took to do that. I'm glad this video is helping so many Sig shooters get back at it.

Thank you! I tried to make it pretty much no-nonsense. I appreciate you watching and subscribing.

Hell ya, you will enjoy it. Check out the Griffin ATM barrel. It's a solid upgrade that I think looks really nice in it. You will see the oem one fade on the paint at the chamber pretty quick. I posted a couple other videos. Currently I'm making a video where I will show all the modifications.

Absolutely! I'm glad it helped. I did the same thing. The only videos I could find were 20min long and waited until the very and to mention it ir didn't say it at all.

@@caseysammobench Those are always "long winded"....that's why. Yours was short and sweet and to the point.

Same here. Thank you, Casey's, for saving my life, my sanity, my future.

Hell ya man. Thank you for the comment toblet me know. I can't imagine how many people are out there struggling with this issue.

Absolutely! Thank you for watching

Np, thank you for taking the time to watch and leave a comment. Much appreciated

Thank you for watching and subscribing! It was pretty irritating and every video I seen took waaay to long to explain it. Just tried to keep it short and to the point in this one.

Your welcome! Hope this video reaches a lot more people. Work has had me going crazy this past year between schools and a move. I haven't posted any videos in a year. So I don't think the algorithm is pushing it as much. However I'm glad it's helping so many.

What a pain in the ass, lol. Hope the vid helped though.

Thank you!

Np, so glad to see this video helping so many people.

Very welcome. Hope this video gets easier to find for people. I'm not a huge channel or anything.

No Problem. Glad it helped!

Np! Glad you found the video.

Np, it took so many videos and like 20min into them to get to the point so I figured I'd make this one. I appreciate you watching and commenting.

Thank you

Mine too. I think once it's worked in a bit it gets a lot easier to do

Np! Glad to see this helping so many people.

Np

Absolutely brother! Thank you for using the video. It's nearly the same as the m18. Except for the guide rod. I think my issue when I first started using the m18 out of my arms room was not using the slide release lever after putting it back together.

@@caseysammobench yup

@@caseysammobench forgot to subscribed earlier, done now

Haha, they got me too. It took over a week to find a video that mentioned it. Figured others might be in the same boat.

Your welcome, it's a bad ass pistol. It doesn't matter which way the holes are, as long as they are up and down.

@@caseysammobench Lighting fast reply! Subbed man. Other vids didn’t show this much detail. Keep up the great work! I’m excited to see how this compares to my Canik TP9SF…I’m sure it will be a beast in comparison

Hell ya, I really appreciate it. Check out the apex trigger kit as well. I love it compared to the stock trigger. It's paired with the ndz performance trigger spring. It really helps with the kinda mushy feel of the trigger.

Thank you! Tried to make it straight to the point. New camera comes in tomorrow so the videos should get more clear and better audio

@@caseysammobench came to this video trying to reassemble after failing to attach an "Ade Advanced Optics RD3-006 Green Dot Sight + Optic Mounting Plate for Sig Sauer P320 M17 / M18 / X5-Legion Pistol" to my M18, guy in the video didn't finish reassembly and I didn't know the recoil spring had to be vertical.. 5 minutes of sweating and a raw thumb later.

So, if you lock the slide to the rear and then use the slide lock release to release the slide. You should have no issues with the magazine locking in or a dead trigger. I ran into that with my M17 at work too and just doing that fixed all my issues with both the m17 and m18.

Thanks for letting me know. I don't live there but have shot Cali compliant guns there and it is such a pain in the ass.

Your welcome, hope it helped.

Thank you, it's not to bad. Just a couple quirks

I think you are right or mostly right. I get to use the m17 alot because they are in the Arms Room at work. The best answer I think I seen is because the round plate would interfere with the FCU assembly on occasion and even still does. That's why the guide rod will sometimes till come through the front on the assembly of an M17. Not sure how true that is but I suppose it is plausible. So to fix it they made the oval on the M18. I will try and reach out to sig and ask.

Dude, it took dang near a week of watching videos to find out what the issue was and none said anything about it for like 20min. It's what prompted this video. I really appreciate you watching and taking the time to leave the comment

I got my M18 a little less than a year ago and have LITERALLY been getting lucky in getting it back together. Thank YOU for making the video.

I don't think it matters. Just the plate being vertical is all.

Also, I just noticed you said you had the CA model. I'm not sure what kinda crazy stuff they do. I'm as far away from Cali as possible in GA. Sorry for the late response. Did you find anything else in your research, though?

@@caseysammobench yes I did the dimple placement is irrelevant it can be on either side it doesn’t matter however as I said before it does need to be placed vertical not horizontal it is to my understanding this dimple is just leftover from the manufacturing process nothing more

I just seen your comment. I'll check on it in the morning and get back with you. I guess I never really noticed it if there is one or not.

It's actually recommended in this pistol to use the slide lock lever and let it go forward.

It shouldn't hurt the gun by any means. But, I believe the preferred method is rack the round with a full magazine safety off in a safe direction, safety on, then remove the mag and insert a new round to replace the one you just chambered and holster.

It's part of the functions check to Rack it Pull and hold the trigger while listening for the trigger dropping. Then while continuing to hold the trigger down re-rack, release the trigger and listen for a metallic click then pull the trigger again. Hope that answers your question. I'm a bit tired out here in the field for the past week and still out here.

@@caseysammobench Okay I think it does haha! I might end up asking again definitely saved this video straight forward and shows exactly what’s happening Thank you for it And not sure what you’re doin out there but stay safe brother 🦅

I'm pretty sure I did that a couple times. Try holding the trigger down and give it some strength pulling it off. Also a rubber mallet and some taps on the back may help if you have some issues pulling it off. Let me know how it goes

Mine doesn't. Is yours new and maybe just need to break in a bit more?

@@caseysammobench yeah it's new just got it Wednesday never shot it just was checking it out at home

@@caseysammobench but it dint do it when I chamber a round

@Reepa008 interesting. Thank you for commenting that. I'm certain if it happened to you, someone else has experienced it before. It could have just needed some oil or any number of things I guess. But this is the first I have heard of that. Also, I know the spring on the 320 is tougher than others. They recommend around 1k rounds threw it to break it in. With all the junk on mine while it being new. I had some troubles cycling it. So I switched to a lighter spring and it has worked out great ever since. I believe it was DPS performance or something along those lines.

@@caseysammobench okay

Hope you got it by now. Definitely just took some outward pressure while rotating. It seemed to come out easier while it was in its original orientation.

It's definitely supposed to be vertical. I believe I mentioned it. Either way I hope the video did help.

I would have responded much sooner but somehow the comments are sometimes taking a day to show up on my notifications.

I'd imagine it still needs the striker reset spring in order to function properly especially in the cycling process to reset the trigger. I'm not exactly sure which spring it is though with that label. But they are probably really cheap online from SIG directly.

@@caseysammobench i mean the small spring in side the striker and it doesn't affect the trigger reset

That does happen sometimes if you don't lock the slide back and release with the slide lock release lever. Also ensure your guide rod is in correctly with the holes vertical, straight up and down. I've seen it where it looks and almost feels like the magazine is in but it won't lock in. Seems to be kind of a quirky thing with this pistol. I don't know exactly why, it was just something I seen on the apex trigger instal video. I have had zero issues from the disassembly and re assembly the way I showed in the video though. Sorry for the late reply. I've been out of the loop the past week handling some business at work. I hope it helps.

I agree and have asked myself several times why it is necessary to do that. I feel like maybe they just knew it was going to the military so they had to make it more complicated than necessary.

Too many design flaws. But Uncle Sam buys these for a little over $200 each!

Interesting. I'm not exactly sure what you mean by leaking. Could you elaborate on that?

@@caseysammobenchI fixed it you have to pop of the plastic bottom of the mag and tighten a bolt

When you go to take the fcu out. Make sure the safety is off, and you press in on the trigger as you rotate it out, lifting up on the rear of the FCU. Hope this helps. I had the same issue.

I went with a DPM performance spring kit and it works great. It didn't lock back after the optic was mounted but still cycled, with barrel and optic it would cycle correctly or only every couple of rounds. If you are having some issues with nothing mounted I would 1st try a different ammo. Next just push some more through it to break it in anyway. I believe sig says it should be broke in at 1k rounds. The DPM spring kit is really nice at 80 bucks though. Comes with three springs. Light, medium and heavy

I have very good luck with mine. But I see what you are saying. I think they broke a lot of trust and for you to even have to question its reliability is an issue.

I feel like mine was pretty hard to push down at first, but after getting it worked in for a little while, it is easier now.