Rise Armament RA-100 Two-Stage Trigger

The Rise Armament RA-100 is a two stage trigger for AR-15 and AR-10 rifles that blends match style control with everyday durability. The first stage takes up smoothly at 1.5 pounds, then the second stage breaks cleanly at 3 pounds, for a total pull weight of 4.5 pounds. That balance gives you a deliberate wall to press against for precision work while staying practical for competition, hunting and tactical use.

What the Rise Armament RA-100 is and who it is for

A two stage trigger is the traditional choice for accuracy shooting because the first stage lets you take the slack out and settle, so the actual break becomes a short, controlled press rather than a guess. This one preserves the crisp feel shooters love in a good single stage break at the end of that travel.

It suits the shooter upgrading a gritty factory trigger on a general purpose rifle, the hunter who wants a predictable break in the cold, and the competitor who prefers a wall to index against. Since it covers both AR-15 and AR-10 sized lowers, one part number serves a whole rack of rifles.

Features that make it work

Rise Armament built this trigger around simplification, which is a rarer engineering choice than it sounds.

• Two stage pull with a 1.5 pound first stage and a 3 pound second stage break
• Machined from S7 tool steel, a shock resistant grade chosen for hammer and sear duty
• Black nitride finish for corrosion resistance and a slick working surface
• Simplified internals with no disconnector and none of the tiny springs of a conventional group
• Fewer small parts, which means fewer potential failure points
• Installs with standard mil spec pins in small pin .154 inch lowers

Specifications and what they mean on the rifle

Total pull weight is 4.5 pounds, split 1.5 pounds of take up and a 3 pound break. That is a genuinely useful weight for a working rifle, light enough to shoot precisely but heavy enough that gloves, cold hands and awkward positions do not turn into surprise discharges.

The S7 tool steel and black nitride combination is the durability story. S7 is chosen for its resistance to impact, which is exactly what a hammer and sear endure thousands of times over, and nitride adds a hard, corrosion resistant surface without the dimensional change of a plated coating.

Fitment covers AR-15 and AR-10 platforms with .154 inch small pin lowers, and it works the same whether your rifle is chambered in .223, 5.56 or .308. The Rise Armament RA-100 does not care what the upper is doing, it only cares that the lower is standard.

Installation, care and practical use

Installation is deliberately ordinary. Standard mil spec pins hold it in, so no special tools, proprietary hardware or gunsmithing are required, and anyone who has swapped a fire control group before will have this done in a few minutes.

Function check every time, without exception. Confirm the hammer follows nothing, the safety blocks the trigger in both positions, and the reset is positive before the rifle sees live ammunition. Do that on an empty rifle at the bench, not on the firing line.

Two stage triggers also reward a little practice. Learn where the wall is on your rifle, take the slack out as the sights settle, and the break becomes something you command rather than something that surprises you.

Keep it lightly lubricated and free of grit, and inspect the pins for walk if your lower runs on the loose side of spec. Once you have felt the difference, browse the rest of our AR parts and upgrades to see what else your build has been putting up with.

Whether your rifle runs .223, 5.56 or .308, the Rise Armament RA-100 is a high value swap out of a rough factory trigger and into real control. Ships direct to your door, no FFL required.