Between you and the Sig Guy I have really come to understand my P320. I really love the in depth videos that you have supplied. Keep up the great work.
I have to say that I love the Sig firearm community, it’s always been welcoming and educational. I do this now as a way to pay it back for everything they’ve taught me and being mentioned with Sig Guy in the same sentence is quite the honor. Thanks! There’s definitely more coming too…I’m working on so many other ideas now, I’ve even got some news I so badly want to share (but can’t just yet) that will open this channel up more than I thought it would when I started it two months back. I appreciate your support! Thanks again for the kind words.
OMFG what an absolute fucking legend you are sir. I don't own a SIG yet but want one bad. I can't even begin to imagine why anyone at this point would even attempt to make a video like this, the bar literally can not be set higher.
That was awesome. Love the clean all white back drop. Smooth and methodical. The part numbers were a nice touch. The speed run at the end was a confidence builder. I took a screenshot of the complete parts lay out lol. Perfect video.
You have a very fine and complete video on the teardown and reassembly of the Sig P320, without any doubt it will be my go to video for the 320. Great work!!!
Amazing video! I’ll be using this as the text book standard for disassembly and reassembly from now on. Did you tumble your FCU and components or hand polish them?
This is probably the most detailed videos on the FCU. Thank you!!! As a side note, I was trying to disassemble the FCU the other day and for the life of me, I couldn’t get the trigger bar to move out of the sear housing. The problem was that I had previously replaced my trigger with the Armory Craft’s trigger. So I had to back out the pre-travel screw before the trigger bar would budge. 😅😅
Great videos, keep them coming…I’ll be doing the manual safety on my P320 in next week or so. When I have all the parts in front of me. Thanks for taking your time to make these videos
Terrific video series. This video is extremely well done and detailed, however, as a certified Sig P320 armorer, it needs to be noted that the sear housing roll pin is considered a one-time use pin due to deformation when hammering it out. These should be replaced when removed.
The best most thorough explanation. You must be an engineer, very well done. Greatly appreciated! My Safety Lever Pivot Pin falls out of the FCU when left side is tilted down. Is this normal?
Great in-depth presentation. It takes away some of the mystery of the Sig P320 FCU. Two questions: what happened to the Safety Lever spring? I like the skeletonized trigger. Where did you get it? Thank you!
Thank you. The safety lever spring was deleted when they came out with the “captured” design of the current safety lever (redundant - you can learn more about this in my video pre-versus post upgrade P320). The Skeletonized trigger is a factory trigger from Sig (sku:8900095) it’s a great trigger right out of the box, if you get a chance, try it out.
Thank you! The polishing will only help if it’s contacting other (moving) metal parts, I would say there is a difference, but there is not a significant one that will change the trigger too much.
I try not to promote any brands in particular but, I can help you with this relatively soon. I am working on a video (right now) that will have me do a complete trigger profile for each trigger ever made for the P320. It’s very data driven and most likely you can find the answer to your question there. Should be out in a week or two.
I use: Remington Dry-lube, M-Pro 7 and slip2000 Extreme Weapon Grease as my main lubricants. I generally spray a bit of Remington in the FCU housing periodically, and use EWG for parts that rub together. Last, I put a drop of M-Pro at the top of the rail slots of the slide and let it drip down via gravity to lube the rails properly… come to think of it, I should probably make a video.
I used to be hesitant when it came to tearing down my FCU. Thanks to your videos. I am now able to take it down and re build it with confidence. It has also helped me understand how my firearm functions. Thank you.
While I was trying to install the FCU into a Wilson Combat Grip Mod, the Safety Lever Pivot Pin fell out. I'm not sure why that happened. I put it back in the correct hole and the pistol seems to function as it should. I have not had a chance to shoot it yet to make sure it works with live ammo. When i did put the FCU into the WC grip mod, I had extreme trouble putting the take down lever back in. It just would not go. Not sure if anyone else has had this problem.
Those seem to be two different issues. The pin falling out is actually a common occurrence, no big deal. You did the right thing, so long as you can see the safety rise and fall with your trigger pull you are good to go. The takedown lever not able to go in is also common, you just need to rotate while turning, sometimes a solid smack of a nylon hammer helps too. (Assuming the issue was the last few millimetres for the lever to sit flush with the grip). I hope this helps!
Unfortunately I had to shelf it for a few other projects. It’s still coming though. Realistically, the benefits are mostly aesthetics. Where it may bring a tangible gain is if you polish the through holes for less friction at the pins, and possibly makes it easier to clean.
@@SIGMECHANICS appreciate the response. You’ve got a new subscriber. Truly unbelievably useful information in ever video. I’ll keep my eyes open for when you are able to post the polishing video.
Spectacular video! First time taking apart my FCU and I was VERY thankful I had your video to walk me through it and reference. The shots were all very clear and up close so you could see exactly what was being manipulated and the info was concise. Keep up the great work!
Thank you! I totally understand the fear and confusion. I remember the first time taking it all apart. Once I realized the parts are not “toys” and don’t just snap and break, I gained the most confidence and the speed increased exponentially. I’m glad the video helped!
@@SIGMECHANICS I actually was installing my Grey Guns competition trigger kit so as you can imagine the anxiety was high with it also being the first time disassembling the FCU but I had the parts and figured I might as well throw em in. Everything went really well except for the trigger install. I had to install the trigger spring after the trigger was attached to the trigger bar because the connection point wouldent align. I just need to remember to take the bottom spring off first when i disassemble it next but other than that I should be ok. Really can't say I notice much of a difference with the competition trigger kit installed though... maybe I'm just a too wet behind the ears but for $200 bucks I was hoping the pre travel would be cleaned up atleast a little bit.
Pre-travel is not really a mechanical goal with the GG kit. Since the only tuning you can do is post travel. However, if you watch my video on my DIY competition trigger job, you can buy a trigger bar, modify it a little and remove (up to), all your pre-travel.
Everything but the take down safety lever bar (black bar on the left side) which is made for the .45 P320. The FCU is also different but only the extractor at the top. Other than that the rest is the grip, slide and barrel but not much on the FCU.
awesome video. I just bought a bare fcu for 100.00 and I have never put together a SIG. i've built many polymer 80's and many ar15's, but never a SIG. thank you.
Thank you! I tried hard to make it like reading a book. There’s just so many parts and I remember when I started off it seemed like a lot. I made this video as if something I wish I had at that time. Glad it helped!!
Wow! Makes me feel confortable wanting to try to disassemble my Legion X5 someday if it will need a part replacement! Another fantastic video. Thank you!
My experience is that the slide catch spring and post DO NOT stay in place on the slide catch before it’s installed. I need a dab of grease. Your instructions are perfect, really clinical. From a text book perspective your videos fit. A bit of real world frustration would be helpful to show that things don’t always fall together perfectly.
That’s a very good point. I’ve been considering doing a video to deep clean the gun at a regular pace so that viewers would be able to follow along real time, that would be an excellent opportunity to implement your suggestion. Thanks!
Did everything step by step in this video for my stripped FCU p320 in .45acp. The only issue I keep getting after purchasing two trigger springs is the trigger system with the kit my lower parts kit came with. Whenever I press the trigger to dry fire, hold down the trigger, rack the slide back and forth and let go of the trigger, the trigger will not reset. I can use my finger to push the trigger out and it’ll disengage again but other than that it just doesn’t reset. Not sure if it’s the trigger bar or if I really just have two bad springs (one came with the parts kit, the other one I actually just bought recently and still have the issue). Any help would be awesome to know why my trigger can’t reset while holding it down l, racking the slide, and releasing the trigger after the slide rack.
The number one cause is an incorrectly installed trigger that’s causing the outer frame of the trigger (the part with the pin on it that connects with trigger bar) to rub against the grip. Usually caused by the trigger shoe not being pushed all the way through the FCU. I would disassemble and try again.
First off thank you for all you videos. Incredibly helpful. In the Apes trigger bar you indicated that the Apex bar will work for both manual and non safety weapons. i want to add and external safety to my 320 and wanted to verify it will work. I have a Wilson grip module. Can the external safety be installed on the Wilson grip.
Thank you! To answer your question, yes, although it’s not shown in the video, others have done the conversion. However it usually requires a degree of steady hand work as the jig may only get you most of the way to completion on the grip module. The FCU jig works on all P320 FCUs.
@@SIGMECHANICS small, round, with the ends almost opposite from each other. The Compact shoots fine, which is where the spring came from. This Compact is an older one, before the voluntary upgrade, which it was upgraded. The legion didn't have it
@@SIGMECHANICS Sent! Yes I believe you're correct. I wonder why Sig put it back in it when they upgraded it.. either way, I only noticed it when I disassembled both and discovered this spring from the Compact one, and it dry fires no problem, when reassembled..
Yeah, now that I saw the picture, 100% it’s the older safety lever spring. If they kept it after the upgrade, it’s because they kept the old safety lever that has a little notch to receive it (not sure why). You can easily take care of that by buying the updated safety lever. I would put it back in there though, even though I’ve done it myself… since it’s safety related don’t play with it.
Excellent video. I love this pistol, but it combines ALL of my most hated design elements as far as maintenance and tear down goes. A lot of springs, free floating components that don't lock into place, and pins that don't have a set stopping point.
Thank you. It’s a great platform to work with. It looks complicated at first, but then becomes very simple. Once you know how everything is put together.
Best video I have seen for the fcu. I just installed the Sig Armorer competition kit in my X5 that has at least 6000 rounds through it. Needless to say my fcu was really dirty. Thanks for the excellent video. Wish I saw your video first. I am definitely sharing it with a shooter that’s considering to upgrade his trigger.
Does the sig armorer sell kits? The site looked like it was only service to send it in? Not an option for me as I'm out of state I live in TX but extended work in CA
@@crherniman yes he does as I bought the kit. His name is Robert Burke. He is in Texas also. Some body had a site trying to deceive people that they were him. I think Shooters Connection or some other site that caters to USPSA shooters carry his kit. Hit me back if you can’t find it and I will get his contact for you as if I remember where I put the info mailed with the kit. I bought the competition package and love it.
@@crherniman type in ‘the sig armorer’ in your search. When his page shows up you will see a picture that says new parts available. Hit that and the kits should appear.
Yeah, you’re right. It’s an ejector. I’m just so used to calling it a mag stop bar because so many people bend it out of shape when they force a magazine in there.
@@SIGMECHANICS i sure would love to see a video on the sig P322 complete takedown and reassemble. as i previously stated, due to the constant suppression of gun videos , i would purchase your collection on the 320 and other sig videos to have your excellent content outside of youtube. much respect for all you do for us sig owners.
