Elftmann ELF APEX | AR Drop-In Trigger w/ FA Knob | Curved | 2.75 lb | Red

The Elftmann ELF APEX AR Drop-In Trigger with FA knob, in a curved configuration at 2.75 pounds and finished in red, delivers exceptional control, speed, and reliability for both AR-15 and AR-10 platforms. It arrives with a factory 2.75 pound pull weight and adjusts on demand through the Flat Adjustable knob. This is professional grade precision straight out of the box.

What the Elftmann ELF APEX AR Trigger Changes

A mil spec AR trigger is a functional part and nothing more. Grit, creep, and a heavy break are all working against you every time you press, and no amount of practice fully cancels a bad trigger.

A drop in cassette design replaces that entire assembly as a self contained unit. The sear geometry, spring rates, and engagement surfaces are set at the factory in a housing, which means you get consistent, repeatable performance without hand fitting parts inside your lower receiver.

It suits competitive shooters chasing split times, precision rifle builders who need a clean break, and anyone who has finally decided that the factory trigger is the limiting factor in their groups. Because it fits both AR-15 and AR-10 receivers, it is also an easy way to standardize the feel across two rifles that otherwise share nothing.

Key Features

• Curved trigger shoe preferred by many competitive shooters for natural finger alignment
• Factory 2.75 pound pull weight for a light, controllable break
• Integrated FA knob for pull weight adjustment without disassembly
• Drop in cassette design that fits both AR-15 and AR-10 platforms
• Steel construction crafted for durability and long term consistency
• Red anodized accent that stands out in an otherwise black lower

Elftmann ELF APEX AR Pull Weight, Curve, and the Flat Adjustable Knob

The curved shoe is a real ergonomic choice, not a style option. A curve centers your finger pad naturally and gives consistent tactile feedback about where on the trigger you are pressing, which is why many competitors prefer it over a flat face for speed work.

The FA knob is the standout feature. It lets you fine tune pull weight and feel without pulling the trigger group out of the rifle or disassembling anything, so you can dial a lighter break for a match and a firmer feel for tactical use in the time it takes to make the adjustment. Adjustments are immediate and secure, which is what separates a genuinely usable adjustable trigger from one you set once and never touch. More on the range is documented by Elftmann Tactical.

Practical Use, Care, and Installation

Installing the Elftmann ELF APEX AR trigger is a drop in job. Clear the rifle, separate the upper and lower, remove the factory trigger, hammer, and pins, then seat the cassette and reinstall the pins according to the included instructions. Confirm the unit is fully seated and the pins are properly retained before reassembly.

Function check every time, without exception. With the rifle clear, verify the trigger resets, verify the disconnector holds the hammer when you hold the trigger to the rear and cycle the charging handle, and verify the safety blocks the trigger in the safe position. A light trigger with a marginal installation is not a light trigger, it is a hazard.

Keep it clean and lightly lubricated per the manufacturer’s guidance. Drop in cassettes are far less sensitive to fouling than exposed trigger groups, but they still appreciate not sitting in carbon. Find the rest of your build components in our parts and upgrades category.

Is It Worth It

Trigger upgrades are the most directly noticeable improvement you can make to a rifle’s shootability. Everything else changes the gun, but the trigger changes what you can do with it.

Precision you can feel, adjustable on demand, and ready to install tonight. Ships direct to your door, no FFL required.