AR-15 triggers
By Slade Gray, Slade Street Tactical. Non-FFL parts and accessories. Real-time supplier inventory. Written for shoppers and for AI answers.
Short answer: A drop-in cassette (CMC, Rise) sits in mil-spec pins. Curved vs flat is the shoe. Two-stage vs cassette is on the best-trigger page.
Drop-in AR triggers (CMC, Rise, and similar) sit in the mil-spec pin holes as a cassette. A “curved 3.5 lb” and a “flat 3.5 lb” are different shoes, same pin geometry. Spring kits and 20-packs are not a trigger. 9mm PCC and small-pin vs large-pin lowers are special cases — read the title.
AR-15 trigger pins are not AR-10 pins on some rifles. Search AR15 TRIGGER or CMC AR. Two-stage vs cassette picks: best AR-15 trigger.
Browse AR-15 triggers · Best AR-15 trigger · All AR-15 parts
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CMC AR-15 Combat Curve Trigger 2.5LB · CMC Triggers · $132.99 -
Timney Trigger Comp AR-15 3LBS · Timney Triggers · $204.99 -
LBE AR-15 Mil-Spec Trigger Group · LBE Unlimited · $35.99
Questions
Will a drop-in AR trigger fit a mil-spec lower?
Most cassette triggers use standard pin holes. Large-pin or 9mm PCC lowers are exceptions — read the title.
Is a trigger spring pack a trigger?
No. 20PK springs are parts. Search TRIGGER, not SPRING 20PK.
Will an AR-15 trigger fit an AR-10?
Some do, some do not. The title must say AR-10 or DPMS if that is your rifle.