The Rise Armament RA-140 Super Sporting Trigger (SST) (brand part number T017FBLK) is a single-stage, drop-in upgrade built for AR-platform rifles that need a cleaner break than a mil-spec trigger group delivers. Rise Armament machines the flat-faced trigger blade and housing from hardened steel and finishes it in a durable black hardcoat anodized coating, then sets it to a consistent 3.50-lb draw weight for right-hand shooters. Anti-walk pins ship with the kit, so the housing locks into the lower receiver without pin migration under recoil. It is a straightforward, no-gunsmithing swap for competition shooters, home-defense rifles, or anyone chasing a crisper trigger pull.

Key Specifications

• The single-stage design delivers a consistent break with no take-up stacking before the wall.
• Draw weight is factory-set to 3.50 lbs, noticeably lighter and crisper than a typical mil-spec trigger pull.
• A flat-face trigger blade gives a consistent finger placement point for repeatable pulls.
• Drop-in installation means no fitting, filing, or gunsmith visit is required.
• Housing and blade are finished in black hardcoat anodizing for wear and corrosion resistance.
• Configured for right-hand shooters.
• Includes anti-walk pins to keep the housing secure in the lower receiver under recoil.
• The self-contained housing measures roughly 7 inches, sized to drop into a standard AR-15 lower receiver pocket.
• Built to fit any AR-platform rifle using a standard mil-spec lower receiver.

Frequently Asked Questions

Will this drop into a factory AR-15 lower without modification? Yes, the RA-140 is a self-contained drop-in unit that installs into standard AR-15/AR-platform lower receivers using the included anti-walk pins.

Is this a single-stage or two-stage trigger? Single-stage — the trigger breaks cleanly at 3.50 lbs with no separate take-up stage.

What finish does the trigger use? A black hardcoat anodized finish on both the housing and the flat trigger blade for long-term wear resistance.

Buy the Rise Armament RA-140 Super Sporting Flat Trigger

Upgrade your AR-platform rifle’s trigger feel without a trip to the gunsmith. Order the RA-140 from our Rise Armament lineup of AR triggers and get fast, reliable shipping from our Lubbock, Texas gun shop.