r/AR9 is a subreddit with 33k members. The most common kinds of discussions are solution requests and advice requests, and the community frequently discusses ar9, build, parts, trigger, and cmmg, and they frequently recommend/review muzzle device, pcc, and chest rig.
A place to discuss variants of the AR series that are chambered for pistol cartridges, including 9mm, .40S&W, .45ACP, 10mm, and 22LR.
Popular Themes in r/AR9
#1
Solution Requests
: "9MM Bandolier Suggestions?"
2 posts
#2
Advice Requests
: "Question about FM9 Upper and Handguard"
2 posts
#3
Pain & Anger
: "Issues w/ my ar9 build"
1 post
Popular Topics in r/AR9
#1
Ar9
: "Need smaller handguard for Ar9 for ASR can"
12 posts
#2
Build
: "My First “AR 9”"
8 posts
#3
Parts
: "I need your opinion. Shaving 5oz from the front of the 11.5" pistol or adding 2oz of barrel weight but getting higher quality barrel? Purpose: All purpose/home defence/SHTF/Range gun. Read details. I know it's AR15, but the topic is still relevant."
5 posts
#4
Trigger
: "Newest Trigger Kicker Host 🧈 BRIGADE BM-9"
5 posts
#5
Cmmg
: "349 RPM (Full Auto) with Cmmg RDB 9mm and using magnets to induce Eddy currents"
3 posts
#6
Eddy Current
: "Eddy Current damper working fine."
2 posts
#7
Host
: "Newest Trigger Kicker Host 🧈 BRIGADE BM-9"
2 posts
#8
Sights
1 post
#9
Stern
1 post
#10
Eject
1 post
Products Discussed in r/AR9
Muzzle Device
12 reviews
#1
Kaw Valley Precision
4.5★ from 2 reviews
#2
Mach 3
4.0★ from 1 review
#3
Bixler
4.0★ from 1 review
Pcc
9 reviews
#1
Mach 3
4.0★ from 2 reviews
#2
Energetic Arms
5.0★ from 1 review
#3
SLR Synergy
5.0★ from 1 review
Chest Rig
7 reviews
#1
Spiritus Systems
4.5★ from 2 reviews
#2
Haley Strategic
4.0★ from 1 review
#3
Chicom
4.0★ from 1 review
Flair Used in r/AR9
#1
Part Compatibility
: "Newest Trigger Kicker Host 🧈 BRIGADE BM-9"
6 posts
#2
Eye Candy
: "Pretty happy how it turned out"
5 posts
#3
Troubleshooting
: "Mean Arms Exomags Issues"
5 posts
#4
Radial Delay
: "My First “AR 9”"
4 posts
#5
How To
: "Possible to build a colt pattern AR pistol for sub $700?"
2 posts
#6
Pre-Build Review
: "For the love of the game"
1 post
#7
Roller/Bearing Delay
: "Delayed MP5 setup to convert to a true SD options possible FRT in future"
1 post
#8
Deal Alert
: "PA Sale"
1 post
Member Growth in r/AR9
Yearly
+6k members(21.7%)
Similar Subreddits to r/AR9
r/AR10
64k members
11.6% / yr
r/ar15build
8k members
6.7% / yr
About
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Last updated: September 30, 2026