r/AR9

I have sometimes feeding problems. Could the uneven part of the feeding cane be a problem ?

A couple changes to a junkyard build. Got the form1 back so I swapped from an H&R brace to an RRA Entry Stock. Added a PA 2.5 prism, and threw on a VTAC sling I had.

-Required build list-

PSA lower + milspec lpk

CProducts mag adapter

No Name SS

KVP PCC buffer

RRA Entry Stock

VTAC sling

VDD slick side upper

Mystery carry handle

Tacfire bolt

BA 8.3 barrel

Mystery fsb/handguard

PA 2.5 prism

This thing is awesome! I have had a couple feed issues and a couple dead triggers so I'm wondering if it's just an ammo thing or if I need to adjust something or just break it in more.

Thank you Blowback9 for all the info you've given that I used for this build. Tons of compliments on how it shoots from others too.

Ammo I've used most of is Ammo Inc 124g. (Yeah I know, not the greatest stuff but it works.)

The parts list and a photo of the couple smooshed rounds in the comments.

Hey y'all, lefty here. Didn't have any issues with my new Banshee until I put the CAT MOB suppressor on, now I feel like I'm getting lightly sandblasted with blowback on every round. Tried Federal HST, CCI Blazer, and Speer, all 147gr. No difference. Is this just my life now?

Colt 6951 9mm carbine lower
Colt smg 9mm upper reciever
Colt bcg
Colt lower parts kit
B5 car15 stock
B5 car15 LS2 grip
Wilcox CompM ECOS-N mount
Aimpoint comp m2 (surplus)
KAC USMC lollipop rear sight p/n 25650
KAC FF Carbine RAS hand guard “Too Long” p/n 20211
KAC stubby broom handle - sourced from tacswap
Ballistic Advantage 11" 9MM Straight Profile, Modern Series (OEM) barrel
DEZ Tactical Arms A2 Fixed Front Sight Clamp-on (.750")
Huxwrx Flow 9k ti
Geissele airborne charging handle

FoxTrot Mike AR9
With Tommy gun furniture from
Custom Firearm Products.com LLC

GRS in an FM9 lower, YHM R9 tucked on a 5.5” barrel. Toolcraft bolt

It is with much info and inspiration gleaned from perusing this sub (special thanks to Mr. Blowback9 for sharing his wealth of knowledge) that I endeavored to build and now present The "Silver Dollar", a two stamp integrally suppressed 9x19 blaster! It was a fun and challenging little project that turned out to be fairly inexpensive thanks to $0 tax stamps. Was going for a corroded metal look with the paint job. And best of all, the cub approves! 😸

Components:

- Aero Precision M4E1 receivers (form 1 SBR)

- KVP bolt and 10 oz modified buffer

- Alpha Shooting Sports 5.25" barrel

- Angstadt flash hider (pending delivery)

- Strike Industries flat wire spring, buffer tube, charging handle and controls

- Extar EP9 rubber bump-stop

- PWS ratcheting castle nut/end plate

- Magpul MOE SL stock and K2 grip

- Anderson Mfg fire control group

- Mean Arms Exomag w/ejector

- Meprolight RDS Pro V2

- Form 1 reflexed suppressor, 16 baffles

- Rust-Oleum forged hammered antique pewter spray paint

A few notes on the can: foundation is a tubular handguard with barrel nut modified to provide a gas seal at the rear. Baffle stack is alternating baffles and spacers on 3 support rods mounted to a muzzle flange that provides axial constraint. Radial constraint is provided by the tube. Baffle aperture is a generous 0.5" to reduce back pressure and allow for some slop in alignment and the muzzle flange is ported for expansion into the reflexed volume.

PSA AR-V 9mm with 8 inch barrel

• SB Tactical PDW pistol brace
• Magpul pistol grip
• Vortex Sparc AR 2 MOA red dot
• Vortex 3x Micro Magnifier
• Olight Odin Mini light with pressure pad
• Huxwrx Flow 9k ti suppressor
• Banish 1/2x28 fixed adapter
• Emissary Development Accelerator grip
• Magpul rail covers
• CZ Scorpion Magazine

Fm9 foxtrot mike
Utg rear sights

Both my 5.56 and 9mm running smooth. Suppressors are fun too

Always wanted a PCC. Was gonna get a Kuna when I found the DD for a couple hundred bucks more. Love this gun, it feeds any and everything. All I need now is a suppressor and a better optic. Going Rugged Sub9 for the suppressor. Thinking AEMS or 512c for the dot… which one would y’all go with?

Was looking for one for a while finally found it in stock at RichmandTactical. Don’t have any equipment to test the sound but with 115gr it sounded really good, waiting on more ammo to see how it sounds next to a regular AR9. Only a quick trip only 100 rounds but 0 malfunctions had Remington herters and Winchester all feed fine didn’t do any defense ammo yet just wanted to put some rounds down range.

H&R colt lower, PSA trigger, stern defense RAB-AD, GRS (A5 tube RB5000HP 2 kynshot weights), gauntlet arms stock, matrix arms upper, Novox research x-sd barrel kit, Midwest industries sp series handguard, flow 9k, eotech DCR and g45 magnifier.

Build list: spikes colt mag lower, milspec trigger, milspec carbine buffer tube and HAR brace,matrix 9mm upper, KVP bolt, KVP 10oz extended buffer, carbine buffer spring, BA EPC 5.5 barrel, warhammer CH, prisma 4.2 handguard, noveske tri lug MD, DAC VCG grip, Romeo5 elite, harbor freight tlr1 clone, YHM r9

A few months ago I posted on here about my build and was using the standard R&D colt mag adapter with PSA lower. I did the snake bite mod and properly adjusted my ejector, but kept running into problems.

No matter how hard I tried to secure the adaptor it would always slide up with inserting a mag with the slightest amount of force. I eventually gave up on it and decided to give the spikes lower a shot. And man am I happy I did. This thing ran great right out of the box. I even contacted spikes to get a second ejector as a backup, if I ended up adjusting mine wrong. Well I guess I got lucky, because out of the box even with the ejector not perfect, this thing has run flawlessly suppressed and unsuppressed. Both the C product and metal form mags feed and fit great. LRBHO has worked on everything, and I’m finally happy to have an AR9 that can run with a little abuse.

If you’re thinking of making a colt mag style I highly recommend just spending a little bit of money and getting a dedicated lower.

...So I decided to do my first AR9.

First few mags had failures to eject, 1 or 2 about every ten rounds. Ejector position was reasonable, but found the IDL bolt had no insert or o-ring on the extractor. Replaced the extractor spring with a BCM and added the insert, and so far so good! Needs some more rounds to call it absolutely reliable, but a great start!

Recoil feels really good, no worse than a 5.56, and better than my apparently over gassed midlength 16".

So far using 17 and 27 round Magpul, and 31 round SGM mags, no issues on that front.

Lower:

SBR'd Anderson, all milspec

Stern AD9 adapter and flared magwell

KAK mini milspec buffer tube & "micro" buffer (1 Tungsten weight, about 3.3oz)

2 of Blowback9's pinewood derby tungsten weights, about 6oz total

C3Junkie flat wire spring, trimmed until I got bolt lock back

Chopped B5 Bravo stock

DAC ULCG grip

Upper:

AO Precision milspec receiver

Ballistic Advantage 5.5" barrel

KAK flash can

NBS (? I think, cheap one from AR15discounts) 7" handguard

IDL bolt

Milspec charging handle

B5 vert grip and Magpul mlok inserts

Cheap Truglo dot and Amazon "Unity" riser.

These have been on a number of ARs, and are usually placeholders for something better. They just keep ticking, so this might be their permanent home 😆