5 Things to Consider for a 9mm AR-15
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- Опубліковано 2 сер 2024
- AR-9s are not as straightforward as the AR-15 platform is, and here is an overview of some of the nuances you will have to keep in mind before you begin!
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We are Delta Team Tactical! We are an online firearms parts and tactical gear retailer based in Orem, Utah. We specialize in custom AR-15, Glock, and various other firearms-related items. We are dedicating this UA-cam channel to the entertainment, education, and development of firearms ownership, enthusiasts, and builders!
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All great points to consider before buying or building an AR-9. One other point is the option for Last-Round-Bolt-Hold-Open (LRBHO). Some receivers have it and some don't so decide if its important for you before you buy.
One thing I didn't hear mentioned is the relationship between Barrel Length and the BCG weight, Buffer Weight and Spring. I found the usual 16" barrel cycled ok with the standard 5 to 8oz buffer using a light carbine spring. With the same lower setup and going to a 5" barrel I predicted less blowback which would require a lighter buffer and or spring. Keep in mind the BCG weight combined with the buffer weight is what's being driven back so a light or heavy spring needs to be factored into the equation to happily absorb the energy without crashing into the back of the buffertube and cycle the return . The BCG weight is a constant but the buffer weight and spring weight choices are what is needed to calculate the balance of blowback gases . After Bang... the BCG weight combined with buffer weight accelerating against the spring and coming back is what your after. Simply choosing a heavier buffer without Identifying the BCG weight and spring weight is a huge headache. It takes a bit of research to find the correct combo in order to have a reliably cycling firearm
Read a long article about buffer weight. Bottom line is the combined weight of your bolt and buffer needs to be between 22 and 24 oz. Must use PCC buffer, they are longer. I have 2 PCC. I use a flat wire spring from David Tubbs and one from Springco both work great.
One of the best brain dumps on a 9mm build around. Appreciate the insight. "Tricky" isn't so intimidating if you have the information and can plan for it. Thanks guys.
I have a 4” and an 8” complete upper from PSA. I’m in California and you have to do a build to have a PCC. I’ve put them on AR15 lowers. Use PCC buffer and flat wire buffer springs. PSA bolts are 14 oz, combined weight of bolt and buffer should be 22 to 24 oz if I’m reading correct information.
I have a dedicated AR 9mm that uses the Glock mag's and I love it. At first it didn't cycle well but after a few adjustments, it worked perfect and so fun to shoot. GREAT video.
Nice video guys. Answered the questions I had and makes me want to get a kit and upper to 9mm. Thanks as always!
Thank you for the tips!
without a doubt one of the definitive pcc built vids on the net. tank you so much for the info. ive been kicking around the idea of building a pcc for a while. ive just recently gotten very serious about it. i think im gonna go ahead and get it done. been debating whether i need to build a .308 dmr platform or a pcc in 9mm. i think ive decided to put off the dmr build for a while and focus on the pcc. thank you for all the info i had no idea about. looks like im going with a 9mm specific lower. i dont wanna deal with attachment's and other options that are just possible fail points. but its nice to know they are out there. . i knew there had to be bigger and heavier options out there. thanks for all you do, great video.
A bunch of good info... Thanks!
Good information!
Thanks for the info on builds
Thank you gentlemen on such a superb informative video. 👏 👍🏆🥇
Great information. Thank you.
Great information
Awesome info
Thanks for the info
Thanks guys. New subscriber to the channel and this video DID help 👍🏻👍🏻
Very helpful information, thanks!
Good info. A useful rundown.
Excellent video
Another great instructional video from DTT.
Good advice.
Good Information.
very useful information
great video
This was instructive. Glad I viewed this.
I picked up several years ago a very early Lone Wolf R&D dedicated 9mm using Glock mags lower with a YHM Black Diamond 9mm upper 16" barrel using a CMMG BCG. Guy couldn't get it right so I took it off his hands. Took some experimenting with buffer weight using and Odin adjustable buffer ending up at 7.4 oz, a few quarters in the back of the buffer tube to limit how far back the BCG travels. Took some tweaking and working but now it is reliable and fun!
Great content considering I'm building one now.
good info
Great info, AR-9 is on my list to build.
Some things I did not know thanks guys
great bullet points!
Good explanations
Some useful information
good advise.
thanks for sharing...didn't know
Great video guys
Thank you! Glad you enjoyed it!
Very interesting video.
I really dig your company. I purchase something from you folks every 2 to 3 weeks. Great quality and amazing prices!!!
I ended up chosing the endo Mag option because I had 3 unused 556 PMAGs and I already had two Aero Precision M4E1 lowers that were shooting 556 and 300blk. I added the PSA PCC 9mm complete upper and will use with the 556 lower.
Plannning to add Omega 36m to the mix.
I admire people who build their own ... I'm not quite there, but is very interesting. Thank you guys.
Very nice
A lot of great information to consider before tackling an AR-9 build.
That's interesting. I'll probably build one of those next.
So many options for the AR platform!!🎉🎉
nice video
Wish you had this up before I did my 45 cal. upper build! That was my first build and I got in over my head. If it wasn't for Andy holding my hand and guiding me through it, it would only be a
"parts gun"! Thank you very much Andy, I've never had the personal service like you gave me. You've gained a customer for life!
Did you have to do a 6 oz buffer weight
I picked up a standard AR magwell conversion to run the Colt mags, picked up a Foxtrot Mike upper, primarily to be able to run a 9mm rifle while waiting on the new Mean Arms upper which actually will run on a standard AR-15 buffer as it's a ball bearing delayed upper plus you just run Exo/Endo mags . Finally decided to just build two SMF Colt mag specific lowers for each rifle and in the end I may build a .40 and a .45 which would be a hot little home defense number, not that a 9mm from a 16" isn't about as hot as a .357 Magnum from a 6" barrel which is a definite manstopper.
Very informative thank you! Want to do this soooooo bad. Time and money are the devils keeping me from accomplishing that goal!
Yeap - straightforward and simple list. Not every single possible issue covered under the Sun- BUT - absolutely will get you pointed in the right direction. When ya come across, if ya come across, any other particular issues you'll be well on your way to figuring them out - Be Safe - Shoot Straight and Pray for Peace
I've been thinking about getting one seems like a good choice
Thanks. Now I know I will stick to a dedicated PPC because I don't wanna mess with all the tweaking.
Ready Gunner and Get Some there in Orem are usually good about having the ammo you need for their indoor firing range .
I visited there from Missouri and was impressed by Orem . I grew up in Ogden and it wasn't like I remembered it .
Interesting info on building a pcc.
Have a Rock River 9mm AR with a 18inch war sport barrel Timber Creek free floating hand guard and it uses Colt style stick mags I have never out run the gun and shoot as fast as I can get ith never any issues at all some Colt Style stick mags have the last round bolt hold open some don’t but either one runs flawlessly
I love mine
I will need this in the fuiture
Nice
Fun to play with
Great video guys. My second decision is if I want a last round bolt hold open(LRBHO) feature. There are basically two types,. One is built into the lower receiver, and second the upper receiver. I've done both types for 9mm, and 45acp. The cost of the lower is going to be much higher having an LRBHO built in($279 Angstadt Arms, Spikes $159). Any upper will work with these. These are the easiest, but add $125 or more to the build. The lowers without LRBHO are cheaper(Aero $119, Frontier $139). The uppers are a little more though(Aero Precision $119, Frontier $139). The uppers that have LRBHO mechanism have to be adjusted for your magazines, unless you strictly use Glock mags. PMag use requires adjustment. I've found it easier to adjust with the barrel not installed. They are all a blast to shoot.
I recently saw a video from Delta about the new Davidson Defense upper receiver called called the "Vertex" especially designed for 9mm. Should I order this, or will all upper receivers work? I want the LRBHO function. I called Spikes about their lower receiver you mentioned above and they did not think their lower with LRBHO feature will work on the Davidson Defense uppers. You said it does-correct?
@@charlestompkins4547 I believe there are only a few "generic" uppers. I've seen that exact upper with a few different manufacturers names. I have not used this upper, but I've used a few that are identical, from other sites with Spikes lowers, and no problems. If your building a blowback 9mm, feed ramps are built into the barrels, so no real reason to not work. I've used AR Stoner(my favorite), NBS, And Dirty Bird uppers, and they are all very similar.
7.5 oz lengthened buffer is a far better choice with a standard ar15 carbine spring and a bolt that gets the reciprocating mass to right about 22-24 oz.
Hopefully some day..
I've built a couple 9mm PCCs that are vastly different from each other. Pick a brand, contact the company and do some homework before you build. Proper planning prevents a piss poor product. I built a CMMG banshee on a standard lower that takes converted M4 mags and a New Frontier Armory with a dedicated Glock mag lower. Both run extremely well on a variety of loads, suppressed and unsuppressed.
@@DeltaTeamTacticalMedia Yea, most of the companies have done test and tunes and can recommend a winning combo.
Interesting
I had a problem with a 9mm upper (Iron tail i think it was) I ordered from your company. Unfortunately several phone calls and emails were not answered in regards to the issue. Problem ended up being a chamber that was cut too short. As I got no response from your company I ended up changing out the barrel at my own expense. Lesson learned.
Great info guys thanks. Looking at getting the 9mm PCC upper from y'all for a fun short barrel pistol.
I have a PSA PA-15 Multi that I have swapped out on a Colt 5.56 and a .300 Black Out. Would it be legal putting this lower to your 9mm upper as long as I
change out the stock for a pistol brace? I also plan on putting the PMag conversion kit to feed in the 9mm rounds.
I love my 16" 9mm build. My main issue is when I double tap or rapid fire. One by one works great. I use the pmag conversion kit on mag.
That "stubby" one's nice. :)
PSA 9mm 4” or 8” upper and use EndoMags. Has LRBH its on the magazine insert. EndoMags don’t work on all 9mm uppers that’s why you’ll see negative reviews. But they are flawless with the PSA uppers. EndoMags only work with MagPull 30 round magazines
How do you fix an AR9 platform from jamming? Is it the blowback design or short barrel issue? Or possibly the buffer tube...
I (somewhat) disagree with immediately going with the Glock mag platform.
The Colt mag is a double-stack, double-feed mag and is MUCH easier and faster to load, are very reliable if you buy a decent brand, and insert into the magwell *straight*, not at an angle.
This means your reload drills are as close to your rifle-caliber AR as possible and you don't have to think about the angled insertion when seconds may count.
Nice bullet points.
Winner!
Do you guys do build your own kits ?
I just ordered one of your 4.5” barrelled 9mm kits I think it was the “count”. Does the full build kit come with a buffer than should more than likely run smooth or should I look into upgrading the buffer? Thanks
cool
I have a dedicated glock lower that runs flawlessly. I grabbed some endomags recently for my 556 lower and it seems I’m getting consistent jamming issues of the casing lip getting stuck under my bcg. Think I just need a different bcg with that setup or is it maybe another issue?
I Bought Y’all Complete Upper What Else Do I Need Besides The Lower
I couldn't get my Silvan adapter to fit, had to grind down the locking feature that interfaces with the mag well to fit.
That's too bad! We haven't seen that issue yet, could be that you got a bad unit.
Dumb question is the barrel nut for the AR9s the same barrel nut they use on the regular AR-15s or do you have to have a certain barrel nut
What kind of accuracy should be expected with a 9mm 16” barrel? I have a JP barrel it doesn’t seem that great.
I would like to build my own AR one day
What kind of BCG do I need for the Vside upper?
What 9mm bolt works with the echo trigger?
Why use a black table cloth to show black parts? Up close stills of what you are talking about would be really helpful. Thx for the video
Do your uppers work with spikes 9mm lowers?
Buffers. Go long pcc AND HEAVY. 8 Oz or more. I did see a formula forum guys recommended a few years ago weighing both your BCG and your buffer and coming up with a total Oz. I forget what that total number was. I can tell you a foxtrot Mike BCG weight plus a 8 oz buffer will get you in that target weight. AR Stoner and Guntec and many others make a buffer in this weight.(for a REASON) Some people suggest a 308 spring but I never had any problem with 3ars with the 8 oz buffer and a regular AR spring. Some 9 mm Barrels have feed issues with feeding and jams. I have two older ones that I had to add taccom feed ramps to. My last barrels from Rainier Arms feeds anything without any problem. I heard taccom barrels are the ultimate but any other ar9 Barrel seems good as well. The two barrels that I put the feed ramps on will eat anything you throw at them. Hollow-points Steelcase it doesn't matter. But then again my new Barrel will do that too without the added feed ramp. Some internet experts criticize me for using the feed ramps but they fixed all the problems immediately with failure to feed. (Maybe their barrels didn't have this issue, I want my ar9 to feed 100% all the time no matter what I put in it) This is a new frontier though be careful and expect setbacks. In my case scouring the internet and old forums help me get through this very quickly. Had I not done that I would have had a drawer full of extra parts by now
Conventional wisdom is that the reciprocating mass (Bolt + Buffer) should be 19-22oz for 9mm. Add an AR-10 spring, and make sure you use something (quarters, spacer, long buffer) to prevent overtravel.
@@jeffk1485 Thanks
@@tomisnt forgot to add: that's for a 16" barrel. Shorter barrels use a regular carbine spring, and if I still short-strokes, lighten the buffer.
What about the trigger used? I see there are triggers being marketed specifically for AR9mm pccs. Do you have to use these? Are the AR triggers used for 5.56 adequate?
You have to check the Bolt carrier. Most 9mm bolt carriers will work with any standard AR trigger. There are a few that need specific PCC triggers.
What is the barrel length on the one in this video?
9mm Velocity will increase about 25% between a 4" barrel to a 16" barrel .
Do you know of any dedicated 9mm receivers which accept Beretta mags?
I am trying to build a left hand eject 9mm ar-15, can yall help with that?
Additional comment: same issue with the lack of specs as the .308 builds. Manufacturers should get together to establish specs to allow for interchangeability.
Buy PSA Gen 4 9MM upper, put on your AR15 lowers. Don’t use Glock mag setup. Use Mean EndoMags. You must, must, must use a 9MM buffer and upgraded spring.
Lot of info
Wish someone would do this for 10mm
Just got my firearm license here in California. Are we able to buy this kit ?
You need FSC to buy stripped lower through FFL. They can ship all other parts straight to your doorstep without FSC.
Hey! I bought from Delta a complete 9mm upper kit to be use in my standard 5.56 lower receiver, and been having the cycling issue with the Pmag conversion kit (topic #3). Every time I shoot a round, the casing stills stock on the bcg, it doesn’t throw out the case. I’m using my regular 5.56 AR lower receiver which works great. Changing the standard 3oz buffer for a 5.5oz as suggested, should fix this cycling issue? What if I leave the 5.5oz buffer when using my standard 5.56 upper receiver? Would still work or should I change back and forth the buffer every time a change switch the uppers? Thanks for the feedbacks!
You most likely have a CMMG endomag which does not have an ejector.
Why wouldn't they suggest a 7oz buffer for the 9mm?
do you have a mag adapter for glock ? could not find one the sylvan adapter is not available
Stern Defense makes a great adapter for Glock mags.
You first mentioned choosing a mag style but in looking at your 9mm uppers they don't mention mag style. Why?
@@DeltaTeamTacticalMedia Thanks. Looking to use this upper kit 'Davidson Defense 'Neutrashimy' 5.25" AR-15 9MM Nitride Complete Upper Build Kit' on an ar-15 lower with a Sylvan Arms Glock mag conversion. Will it work? New to this 9mm conversion stuff and it gets confusing.