r/AR9 is a subreddit with 32k members. The most common kinds of discussions are solution requests and advice requests, and the community frequently discusses ar9, build, bufferless, ftr, and safety, 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 AR FRT How-To: Short Version"
2 posts
#2
Advice Requests
: "First AR9 pistol build - any advice on the build or optics recommendations"
2 posts
Popular Topics in r/AR9
#1
Ar9
: "My first Ar9 build"
6 posts
#2
Build
: "My first ar9 Build"
3 posts
#3
Bufferless
: "New Bufferless 9mm coming soon"
3 posts
#4
Ftr
: "Bulging cases with FRT"
2 posts
#5
Safety
2 posts
#6
Firing Pin
: "2026: UXCELL Firing Pin spring is no longer recommended"
2 posts
#7
Mag
: "Colt Mags >"
2 posts
#8
9mm
: "New bufferless 9mm coming soon"
2 posts
#9
Glock
: "My take on a colt 9mm carbine with a Bufferless bear creak arsenal 9mm 16in upper on a polymer Fmk lower with magpul furniture. Running exo mags with juggernaut hellfighter kit (California compliant) and if shtf I can pop in a stern defense Glock adapter."
2 posts
#10
Adapter
: "My take on a colt 9mm carbine with a Bufferless bear creak arsenal 9mm 16in upper on a polymer Fmk lower with magpul furniture. Running exo mags with juggernaut hellfighter kit (California compliant) and if shtf I can pop in a stern defense Glock Adapter."
2 posts
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
: "Finally got it working :)"
21 posts
#2
Part Compatibility
: "Trigger Kicker on Brigade BM9"
8 posts
#3
Radial Delay
: "Colt 9mm smg retromod"
5 posts
#4
Troubleshooting
: "What is this seasoning in my lower?"
5 posts
#5
Roller/Bearing Delay
: "JP5 Competition"
3 posts
#6
Pre-Build Review
: "Foxtrot Mike fm9"
2 posts
#7
How To
: "anybody use the heavybuffer UCIW buffet kit?"
1 post
#8
Deal Alert
: "Foxtrot Mike RMB kit is on sale $63+s&h+Tax. https://store.fm-products.com/products/fm-products-rmb-k-5397"
1 post
#9
Buyer Beware
: "Trigger kicker ar9"
1 post
Member Growth in r/AR9
Yearly
+6k members(22.1%)
Similar Subreddits to r/AR9
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Last updated: August 13, 2026