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 build, ar9, parts, hard time, and help, 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
: "help removing safey selector on Panzer arms arp9"
3 posts
#2
Advice Requests
: "rate my washing machine"
3 posts
#3
Pain & Anger
: "This thing is so much fun!"
1 post
#4
Ideas
: "Concept art vote for what looks most sexy"
1 post
#5
Money Talk
: "Tax Free Season in Florida on Firearms, Fishing, and Camping Items… Sept. 1 thru Dec. 31"
1 post
Popular Topics in r/AR9
#1
Build
4 posts
#2
Ar9
4 posts
#3
Parts
3 posts
#4
Hard Time
3 posts
#5
Help
2 posts
#6
Sights
1 post
#7
Stern
1 post
#8
Eject
1 post
#9
Lower
1 post
#10
Noveske
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
Eye Candy
: "Tucked or untucked"
14 posts
#2
Part Compatibility
: "EPC9 lower with Foxtrot Mike Glock mag upper mods"
6 posts
#3
Troubleshooting
: "Magazine springs?"
5 posts
#4
Radial Delay
: "From an AR15 - This:"
3 posts
#5
Pre-Build Review
: "Website says PSA Can't Guarantee Function With EndoMag 9mm Magazines but has anyone used this upper and lower with them?"
2 posts
#6
Roller/Bearing Delay
: "Best Roller Delay Options in 2026?"
1 post
#7
How To
: "Gentle recoil system and Tailhook Mod 1c"
1 post
Member Growth in r/AR9
Yearly
+6k members(21.4%)
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About
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Last updated: November 7, 2026