- 5.5" BA EPC barrel

- Comstock plan B mini brake

- Rearden Atlas (OCL Milkman on the way)

- 5" UTG Pro Arwen

I think this is literally the best possible fit. Not touching the handguard, wrench flats are still exposed, but its still minimal gap.

The UTG *PRO* line have always seemed underrepresented to me IMO.

Not sure if this fits under ar9 or not but wanted to show off my defender. Tax stamp finally got approved yesterday.

Mpa defender with side charging upper

Holosun aro spr evo

A3 telescopic stock.

A3 vert grip

Rugged obsidian 9

My Spike’s Tactical ST9 Colt mag lower has been fantastic since I adjusted my ejector properly. It has been running smooth for a while with two different uppers (4.5” BA EPC barrel w/DA Wolfman on Atlas mount tucked and a 5.5” BA EPC barrel with and the DA Wolfman about half the time).

The buffers I have used have been a Maxim RDB carbine length with a Law folder and anarchy outdoors bolt extension, the GRS with Law folder and a KAK heavy carrier extension, and now a KAK mini milspec buffer tube with a Maxim RDB CQB. It’s installed correctly, no preload or slop.

The other day I started to get bolt lock back on the last round and the Bolt catch became very hard to depress (empty mag, full mag or no mag). I use Duramags

The bolt catch appears to be canted. I reached out to Spikes Tactical Monday morning via phone call and email. I haven’t heard anything yet.

Anyone else experience this?

So I got my hands on a Hoffman trigger kicker. Arrives on Monday. My total mass is 21.3oz. So damn close to 22. I know I might have to up the mass a little. But my real question is the bolt that I have. Looks like the picture on the trigger kicker guide from Hoffman tactical site, kind of. The bottom of the bolt is not “demilled” as it describes on the site for the ones that do not work. What do you guys think? Top bolt on the photo from the site is the one that works. Bottom bolt is the one that is incorrect. I’ve also included photos of my bolt carrier group. Any advice would be awesome! Thank you ar9 fam!!

Anyone got an AR9 that they run with an LVPO? Toying around with this idea and looking for inspiratiom and ideas. Share experience with shooting ranges (100 yards? More?) Thanks!

I’ve had this PCC sitting in a closet a few years now. Had never put more than 20 though the barrel. The other night I got it out to shoot and confirm zero and come up with some plans. Then I took one more shot. I am u familiar with bolts/BCGS like this. But like I said. This is my first PCC and I’m finding confusing details about it. Can anyone point out to me what’s wrong. It randomly just started double feeding every round and won’t even attempt to eject. Any help here would be appreciated. Trying to get this thing back to start running and building around it.

Upper is a Wolfpack AR45 with an 8 inch barrel
Lower is a New Frontier AR45 lower

Playing with optics on it now and just had a random Vortex and magnifier on it.

Any input and education is welcome. Just trying to learn here guys.

I have a PCC 9mm that I built a few years ago and it runs great and never had a issue. I did the Anderson because accepted Glock mags, I have the G26 Gen 5. I purchased a Staccato HD P4 about two months ago, my first one. Unbeknown to me the LGS owner said it takes Glock mags so when I went to our local range I informed the RSO and he pulled his mag out of his Glock and ran out his Glock 17 mag in my Staccato

It never occurred to me before until today so I tired the Staccato HD P4 mag in my Anderson PCC build and it was a no go. The mag catch-release does nothing. Then I tried the Staccato mag in the G26 and it works perfectly. Anyone know the reason why the Anderson lower won't accept the Staccato mag? The Staccato accepts Glock mags and the Glock accepts Staccato HD P4 mags but the Anderson only accepts Glock mags. Thank for looking

My buddy wants to build one but they arent anywhere on the site anymore? Are they just OOS so they dont show up or discontinued?

Cmmg fixed ejector upper, cmmg metal form mag reliability kit, bad attitude lower. Custom 10.3” cmmg barrel.

I am new to the platform and noticed after 30 shots or so, the adapter was backing off the threads a little at the barrel end. So, what non permanent solutions are you guys using to keep your BRT adapters from backing off while shooting?

Hey there! I'm wondering if anyone has any experience with a couple of setups. This is my first time dipping my toes into the world of AR9's

A little preliminary info, barrel is a 16" Faxon, bolt is a Faxon. Starting out with ExoMags to see if it runs before investing in a dedicated lower or tinkering with any mag adapters.

One buffer system I am thinking of trying is the Kynshot RB5015HD in a standard carbine tube with a standard carbine spring. This would be for a quick swap out in a standard carbine lower that's normally used for a 5.56. Has anyone tried this? Does it work okay?

The next one is building a dedicated lower, but since it's hard to find the JRC extended tube to use the classic GRS, I was thinking of the Tubbs 300BO flat spring, the Kynshot RB5015HD and only one Kynshot spacer weight in an A5 tube. Has anyone tried this? The only similar setup I saw to this on Blowback9's blog had the KAK buffer, I believe.

Thanks in advance!