Saw this on their site about timing for the ISU9 and I don’t think it was there before, so figured I’d share in here

Im newish to the PCC world. I got a GFORCE JAWBONE for $450 at my local gun shot. Im just wondering what are some good upgrades im getting a vortex sparc and one mag im just wondering what are some good upgrades and its the 5 inch barrel. Build list im going to gwt a buffer spring and and suppressor and more mags and a different brace and a different charging handle

Im newish to the PCC world. I got a GFORCE JAWBONE for $450 at my local gun shot. Im just wondering what are some good upgrades im getting a vortex sparc and one mag im just wondering what are some good upgrades and its the 5 inch barrel. Build list there really isn't non There are no upgrades grades yet but the red dot and I got the only mag from when I got it.

Went to the range today and had two incidents where my AR9 went brrt. Two round slam fires.

Lower is a standard lower that had an 11.5” 5.56 upper and had no problems but now I’m using a Stern adapter. Using a Schmid Nickel Teflon stock trigger. Disassembled and found nothing wrong with the trigger pins or springs.

Using a BKF 9mm BCG 8.3 Ballistic Advantage barrel and 8oz buffer and Springco blue spring. When I disassembled the bolt the only thing I could tell is the firing pin retaining pin is somewhat bent and the head of the fire pin is gouged a little bit. Firing pin spring looks ok and not broken.

Very new to AR9s so any assistance would be appreciated.

Hi everyone

I’ve been planning out a build for a ar9 for a while now and blowback9’s website has been super helpful to me. I am particularly interested in using his gentle recoil system but i wanted to get the build as small as possible so i wanted to use the sb tactical hbpdw.

I didn’t see anything on blowback9’s website pertaining to this setup so i thought I would ask here to see if anyone had any ideas on what i could do if anything to improve recoil with this setup.

Also if anyone has a setup with the hbpdw or any other pdw setup i would like to hear what you think about it

Ive never seen anything like this before. Im assuming there was a failure to eject, but the next round tried cycling in and was crushed inbetween the bolt and stuck round. Ive shot 100s of rounds through my jawbone and haven't had any major problems. I also wasn't the one shooting when this happened so I cant be certain of what happened. Is there a way to prevent this from happening again? I was running glock gen19 magazines.

Wondering whats the best suppressor for 800 or less with sound mitigation and reduced back pressure(left handed shooter) being the most important. The one I see is the rico309 but its a little over .If anyone has any experience with any good suppressors for ar9s would appreciate it, want to get it by January or February

Recently purchased a PSA PX9 with SBA5 brace and 10" barrel, less then two weeks old and the SBA5 brace is stuck in the closed position. Emailed PSA about the problem so hopefully I can work out a fix but this brace failing already has me thinking I should consider using something different.

First PCC, planning to add a suppressor soon, YHM R9
Wondering what brace/stock is most recommend for similar setup?

Think I have a ACS on my AR10 which is great

Using the Disruptor and the LAT FRT Triggers in a 9mm AR.

I encountered some problems with the Disrupter - not as bad with the LAT. Very light trigger pressure was necessary to get the Disruptor to run, while the LAT would handle a little more finger pressure. Neither would run with the typical amount of finger pressure I use with a Atrius/Arc/SS/etc. other FRT's.

First video is a discussion of the trigger's features and live fire (on Rumble because I don't trust YouTube to not give me another channel strike).

Second video is a technical discussion (posted on both YouTube and Rumble) about what may be going on with these triggers and a possible fix (which may require a re-design of the hammer by The Triggered Company, or a special 9mm hammer).

Part 1: https://rumble.com/v7h8mmk-184-disruptor-and-lat-frt-cassette-triggers-in-a-9mm-ar-pt.1.html

Part 2: https://youtu.be/Wu9RytZvAnc

For those who don't know, none of my videos, links, posts, comments, web pages, etc. are monetized. None. Seriously. I'm completely non-commercialized and make no income from ANY of this. If you want to send a gift to help me buy things to test and make videos about (and keep me caffeinated!), buy me a coffee (or a few) using the link on https://Blowback9.com/donations. If not, no worries! Enjoy the videos and discussion, and I hope it helps!

I’ve never built a ar and this will be my first time buying a frt, I have a gforce jawbone I want to drop in a frt, a friend told me that they dropped in a kabuto frt in there’s looking it up on yt several other people have done that and got a heavier buffer and jt worked great. But I asked Gemini and it said that a kabuto frt would not work on the jawbone it says a frt on a jawbone is not viable was hoping for some help.

Anyone know of any ~10" barrels out there that have a profile for a traditional FSB/handguard cap but also have a good feed cone for Glock type lowers? Usually these seem to be more basic Colt only feed cones.

Looking to purchase either the Springfield Saint Victor 9mm 8.5inch or the PSA AKV 9mm.

Advantages to both but they hover around the same price. I have not personally had enough experience with either to make my decision.

Please let me know your opinions or advice.

Thanks.

FINALLY a complete 9mm upper with bolt that has all the features to support both FRT and Non-FRT builds.

Rumble: https://rumble.com/v7h8ito-183-borebuddy-9mm-no-tune-frt-upper-receiver-great-features-for-non-frt-use.html?e9s=src_v1_upp_a

YouTube (censored version): https://www.youtube.com/watch?v=Tv8RJ_jI27c

TL;DR for people who don't want to watch the video:

• Enhanced feed cone
• Upper rear shelf cut (shouldn't be necessary for 9mm, but it's there anyway)
• Dust cover, shortened PCC ejection port
• Slick side - no deflector or forward assist
• Pre-notched bolt weight for selector-type FRT's/SS
• Deadblow bolt weight to prevent bolt bounce
• XP firing pin spring to prevent firing pin bounce
• 1/2x28 muzzle threads
• Thread protector included
• Rails have QR holes at the front on both sides
• Rails have cooling ports and M-Lok slots
• Muzzle threads are out in front of the handguard for muzzle devices and suppressors
• Available in 6.35", 11.5", and 16.1" barrels
• May NOT work with Foxtrot Mike lower - FM's ejector may rub or catch the bolt. One of my FM lowers worked fine, another jammed.

FRT range test went well with no issues at all.

So far, there is nothing I can find to not like about this upper. I'll be bringing it out for accuracy and hollow point testing in the next week or so.

Uppers: https://borebuddy.com/product/9mm-no-tune-frt-upper-receiver/

Bore Buddy is also selling the XP Firing pin spring for non-FM bolts.... https://borebuddy.com/product/9mm-ar9-extra-power-firing-pin-spring/

Hi this is my second attempt at this build to function properly . It will fire the first 2 or 3 rounds in the magazine then it will load the next one in but can’t pull the trigger I can’t put on safe unless I rack it again remove the unfired round (no primer struck marks or any deformities ) then it will fire again 1 or 2 rounds same problem persisted.
I tried 3 different type of recoil systems still same issue
I removed the ar9 upper and replaced it with an ar15 ( appropriate buffer tube and weight adjustment) and the trigger works great. Any help would be appreciated since I had this rifle for 2 years and I can never get it to fire 10 rounds consecutively. Thank you and I appreciate the time to read this and your knowledge to help me fix this issue.

Build list:
Faxon Firearms 8.5" Light Tapered 9mm SAAMI No Gas Port 4150 Nitride / Melonite Barrel 1:10 Twist

Faxon Firearms 9mm Bolt Carrier Group Complete, Glock & Colt Compatible Nitride

Cross Machine Tool UPUR-3 Big Bore Billet AR-15 Upper Receiver - Slick Side

Mean Arms ENDOMAG - 9MM

FM PRODUCTS RECOIL MITIGATION BUFFER KIT(/second attempt )

Kvp blowback missed w/ 7.5 oz buffer and recoil spring. (First attempt )

Franklin armory lower
Timminey trigger impact single stage.

The Extar was going to eat anything I threw at it is what I read, but I just could not get over that top rail, even with the delete, so I went with the AR9 look of the Mike-9. FM PRODUCTS MIKE9 AMBI SUPER PREMIUM 7'' REAR CHARGE PISTOL W/ RMB

I wanted a kuna but don't have the funds, the fm9 is on sale and I like the idea of purchasing a 5" upper when I find more funds and use the same lower. I have never used an AR platform so this is new even though its a AR9.

My question is, I have a OCL Lithium 9 and want to use it with the FM9, I have been using it as a direct attachment to my Rossi LWC .357 break action single shot, will I need to purchase a special mount or can I just screw on my can like my Rossi .357?

Also, if anyone has any tips or pointers, or recommendations for my new pcc please and thank you in advance for it.

Buy light tomorrow and ambi charging handle, and suppressor and frt early next year, saint victor 8.5 9mm, dosent get as much love idk why sexy af ,any advice on how to much of the bolt to remove(for frt) or anything would be appreciated

I picked up an FM ISU9 and looking to do my first FRT. Would a PSA PX9 lower be okay with this? I’m sure there’s more prep I need to do like change the buffer weight, but is that lower a good idea or will I screw myself buying it? New to all this. Thanks for any help

Edit: thanks everyone, ended up going with the mike9 lower W/ RMB and A5 tube

Some of the early 45acp jawbones were sent out with the rear-charging-only bolt. The way to test is to pull back in the charging handle and try to engage the bolt stop. If you try to press it and it feels like it gets stuck half way and won't lock back, you have the wrong bolt.

I originally went down the rabbit home of the lrbho issue that Doug has called out a few times, but even after shaving it down, I still couldn't lock back.

Reach out to GeForce over the phone if you want a response. Your email/form submission will almost certainly not get a reply.

Can anyone recommend a specific mag pouch for the extra long 40 round ExoMags? I have standar d AR mag pouches but was curious if anyone has found extra deep ones that they prefer.

Are there any prebuilt uppers that are full auto rated? I’ve been looking but not finding that info on any

I recently built an AR9 and used a epc9 upper with enhanced feed cone, colt mag well adapter. A5 buffer tube with flat wire spring, kak extended buffer weight with a kynshot spacer.

This is my first time shooting the upper with the colt adapter. It would feed, shoot and eject round fmj rounds without flaw. Shot around 300 rounds no issue. However whenever I loaded 4 hollow point at first it would shoot fine but the last 2 rounds it would fail to feed. What could be the cause?

Purchased today a bcg on gunbroker for 85 beans delivered. Angstadt Arms model AA09BCGNIT. About to order a 4.5 inch upper from Right to Bear Arms. I have a Mutiny Arms 9mm lower. I have a leftover buffer from an FM-9. As soon as I find a cheap KVP 10 oz, I'll order it. Standard carbine spring. Schmid FCG I think is NiB. Ali Baba SBA-3. Mil Spec carbine buffer tube. I'll put fixed iron sight on front and an A2 carry handle. Biggest concern is getting the ejector to line up. I'll put a red dot on it.

A few months ago I picked up a legit colt smg mag at a surplus store aswell as a strange mag I think is a combo of uzi, colt and maybe another. There's no marks on it anywhere except the witness holes. It has the mag catch cut out for colt and does fit my mag adapter; but it also has another cut out on the left side about 1/2" to 1" above a set of over travel stops and another hole cut infront of the colt catch hole. Other than a slight mod I have to do to make it work a little better in my gun its fine, just wondering if anybody has heard of this mag or knows what it is for.

I’ve wanted an AR9 for a while, and there’s just something about the AR-V with those curved Scorpion mags that I love. I really like the DD PCC too, but it’s outside my budget. Figured I could build out an AR-V exactly how I wanted for less than a stock DD.
After going down the Blowback9 rabbit hole, here’s what I ordered:

PSA AR-V 9mm
Foxtrot Mike RMB + A5 buffer tube
AS Designs ARC-Fire V2
Extra-power firing pin spring
Precut hard-cast bolt weight
KVP ASR-compatible muzzle brake
Magpul MOE SL stock
5 mags total
SilencerCo Omega 36M (already owned)
Red dot and light TBD
Total: $1,223.84 including tax and shipping, excluding the suppressor.

Going for a fun, soft-shooting suppressed PCC that can also pull home-defense duty.
Everything’s ordered, so no range report yet. Curious what y’all think of the setup, especially anyone with experience running the FM RMB or ARC-Fire in an AR-V. Anything you’d have done differently?
I will update the post as the build comes together.