*NOT for CMMG Banshee!* After a great deal of research, study and testing, I discovered (and confirmed many times over) that there are 4 simple key steps that should get almost any 9mm AR feeding, cycling, running, and ejecting properly. Note when I say “100%”, I mean it should feed, fire, and function as reliably as would be expected from a typical quality firearm. No mechanical system runs 100% perfectly 100% of the time.
More information including links can be found at Blowback9.com.
I wear ear plugs, or muffs, or both, in every shooting video.
Disclaimer:
Blowback9’s videos are filmed at a private shooting club in a controlled setting under the supervision of trained professionals. Blowback9’s videos are for entertainment purposes only. Do not try to recreate or mimic anything seen in Blowback9’s videos. Do not act in any way based upon any of the information found in Blowback9’s videos. The accuracy of the information in Blowback9’s videos is not guaranteed or warranted in any way. You, and only you, are responsible for the consequences of your actions. By watching Blowback9’s videos you agree that we will not be held liable for any injury to yourself, others, or property resulting from attempting anything based on what is shown or described in these videos.
Do you have good luck with the epc barrel and hollow points?
I know I am late to the party . But I was hoping to get your input on my wraithworks warscorp9
Runs great in semi auto . But with my frt trigger I believe it is encountering bolt bounce and leading to light strikes .
My bolt and buffer weight combined is 20.5 ounces with a sprinco blue spring.
Any input would be appreciated to have it run reliably . Thank you
What do you think of using a tool craft 9mm bolt recvier. I have some in my ar 15 no problems
If you want to reduce resonance with the spring you can also add a bit of grease to it. Dosen’t take much.
i originally built my AR9 around 2016, using mostly CMMG parts (barrel, receivers, LPK) and never had cycling issues with mine. ive never even used a buffer, just the head of it. i had a buffer that i can put weight in, so i just used the head…reason being, my 9mm bolt is already weighted from the factory
I’d like to see the upper. Mine has a cross spring on the bottom of the upper. Can you explain why? Also the BCG is cone shaped at the tip. Thank you in advance
Solid video and great info all around. For competition PCC’s where you’re also chasing to limit sight movement, there is some value to going with a slightly lower reciprocating mass (closer to 19oz) and higher spring load. Though I absolutely agree the 308 springs are often overkill.
Awesome information thanks for the video. I'm almost finished with my first AR9 build. I got the upper with bolt and CH from PSA it's a brand called tacfire and I am impressed. It has good reviews and the barrel is decently coned. I'm still gonna polish it, comes from being a glock guy. But the only thing I need to purchase is my buffer. I know from other people and your video that I need a heavier one. Actually the 80% lower that I built the company calls for at minimum 9oz. I may try the KAK ind. Because I have had good luck with their products. Thanks for the knowledge. New Subscriber
Something wrong with my FX-9.
Pull trigger and get a click.
Was working perfectly last week.
Disassembled to clean, including trigger, and now it’s not firing.
Dry fire works fine.
Getting a faint primer strike.
I thought firing pin might be stuck but you can push it through from the back manually. Took it out and cleaned it and the spring. Still no bang.
Thoughts?
Just had my first one doing some quick drills. It looks like my issue is now upgrading the spring and trying to find sliding buffer weight
Thx
Can I use GI trigger ?
Great video
Ahhh, that feeling when you find the exact youtube channel you were looking for = Bliss
The only buffer that I could use for my FM-9 PCC was Mike 45 Heavy Buffer, designed for PCCs chambered for .45ACP rounds. Such a heavy buffer had solved all the problems that I had with my PCC, such as bolt bounce, FTFs and so on…
Just took my 9mm rifle for a test drive last week and it runs great. It’s an A5 system so I changed the bolt weight to compensate lighter A5H4 buffer. It runs great even with the Geissele rifle spring. It’s only 115gr factory ammo so hopefully it will work on heavier projectiles
will try this with mine, thank you.
Ok….. I'm running a CMMG radial delayed blowback 8" barrel on a regular Anderson lower using conversion mags….what buffer and spring should I use?
One of the best resources out here! My build is running substantially better. Thanks!
I swear now that I've figured the feed ramp out after finding a single video with very specific and extensive key word searches on multiple apps, youtube has decided I'm allowed to see the pantheon of videos that I looked for initially many moons ago. You're doing the community a great service sir. Sorry for being years late to the party, i was caught in algorithm traffic.
I can’t seem to find a ar15 flat wire carbine spring on Wilson combat. Only ar10
VERY interesting.
This blows a hole in the use of the CMMG Conversion kits. I was considering buying one but now I am very apprehensive.
Thanks!