r/ar15build
8k members
r/ar15build is a subreddit with 8k members. The most common kinds of discussions are advice requests and solution requests, and the community frequently discusses build, ar15, parts, upper, and barrel.
Popular Themes in r/ar15build
#1
Advice Requests
: "First build. New to ARs. Any advice for uppers? Looking to do a build from scratch. I want to know every component of the gun. Thanks!"
12 posts
#2
Solution Requests
: "Would any of you guys recommend the SBA4 over the blade? I found it on sale and I’m not sure if it’s worth it being I already have the Blade 2.0."
7 posts
Popular Topics in r/ar15build
#1
Build
: "Ordered an 16” PSA Build kit the other day. Just picked up this lower today. Excited to Build my first AR!"
65 posts
#2
Ar15
: "Built my first Ar15 1 year ago. I've found it to be addictive and I love it."
47 posts
#3
Parts
: "Two of my “just for fun” ARs. Parts list in comments."
25 posts
#4
Upper
: "First build. New to ARs. Any advice for Uppers? Looking to do a build from scratch. I want to know every component of the gun. Thanks!"
23 posts
#5
Barrel
: "After nearly 3 months of looking for a decent Barrel, I finally finished my Mega Arms/Sionics build. Well...finished for now."
15 posts
#6
Lower
: "Ordered an 16” PSA build kit the other day. Just picked up this Lower today. Excited to build my first AR!"
14 posts
#7
Pistol
: "1st Build - 10.5 Inch .300BLK Pistol"
11 posts
#8
Handguard
: "Here's my first but have a Handguard question"
11 posts
#9
Optic
: "First ar15 build anderson lower with psa 223 wylde upper18” ss barrel . Built myself and now for getting Optics and putting rounds through it ."
11 posts
#10
Ar
: "1st build. 20" PSA upper, BCM BCG, 2.5lb drop in trigger, Strike Industries LPK. Budget build af, but has the good pArts where it counts. I have an SI sail comp I still need to install."
9 posts
Member Growth in r/ar15build
Yearly
+649 members(9.1%)
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Last updated: July 31, 2026