ATRIUS DEVELOPMENT GROUP ADG-FRS-AMBI-G G-LEVER FORCED REST SELECTOR

The Atrius Development Group G-Lever Ambidextrous Forced Reset Selector (ADG-FRS-AMBI-G) is a drop-in AR-15 safety selector built specifically for Geissele SSA, SSA-E, and G2S trigger groups, compatible with mil-spec platforms chambered in .223 Rem, 5.56 NATO, and .300 BLK, giving premium trigger users the same three-position forced reset capability that mil-spec shooters have relied on. This ambidextrous forced reset selector for Geissele-equipped AR-15 rifles brings SUPER-SEMI fire control to the most widely used premium two-stage triggers without replacing or modifying the trigger group itself.

Key Features

• Part number: ADG-FRS-AMBI-G
• Compatible calibers: .223 Rem, 5.56 NATO, .300 BLK
• Platform compatibility: Mil-spec AR-15 with full-profile trigger pocket lower receiver
• Trigger compatibility: Geissele SSA, SSA-E, and G2S (Geissele X Series not compatible)
• Selector positions: SAFE, SEMI, SUPER-SEMI (three-position configuration)
• Throw angle: 90 degrees
• Selector material: Heat-treated 4140 steel
• Selector finish: Corrosion-resistant black nitride
• Lever Blocker material: Aluminum, black nitrided
• Selector type: Ambidextrous, dual lever
• Installation: Drop-in, no fire control group modifications required
• Selector screw: T10, 4/40 thread, torqued to 15 in/lbs with blue Loctite
• Includes: FRS selector, ambidextrous levers, Lever Blocker, spring, T10 screw
• Country of origin: USA

Special Features

• The G-Lever designation identifies this as the Geissele-specific variant of the Atrius FRS line, engineered with a cam geometry that interfaces correctly with the longer trigger bar profile found on SSA, SSA-E, and G2S trigger groups.
• The included Lever Blocker is a precision-machined aluminum component finished in black nitride that prevents the cam lever from over-rotating beneath the trigger group hammer, protecting both the selector and the Geissele fire control group during sustained operation.
• Rather than replacing the existing Geissele trigger, the ADG-FRS-AMBI-G works through the selector position alone, preserving the light, precise two-stage pull that Geissele triggers are known for while adding the SUPER-SEMI engagement mode on top.
• The ambidextrous dual-lever design delivers full selector access from either side of the receiver, giving left- and right-handed shooters identical ergonomics and manipulation speed with no modification required.
• The 90-degree throw produces firm, tactile detent engagement at all three positions, eliminating any ambiguity between SAFE, SEMI, and SUPER-SEMI under fast or gloved operation.
• Heat-treated 4140 steel construction with a black nitride finish provides deep surface hardness and corrosion resistance that holds up to field conditions, sustained range use, and adverse environments.

Practical Benefits

• If your AR-15 already runs a Geissele SSA, SSA-E, or G2S trigger, the ADG-FRS-AMBI-G is the only drop-in forced reset selector engineered to work directly with those trigger groups without compromising their feel or function.
• The drop-in installation requires no machining, no trigger group swap, and no gunsmith work, making this a practical upgrade that protects the investment you already made in your Geissele fire control group.
• The SUPER-SEMI position pairs with the inherently smooth and light two-stage pull of Geissele triggers, producing a combination that performs at a high level in practical shooting competitions and precision-focused training drills where both speed and trigger feel matter.
• Works with mil-spec AR-15 platforms across .223, 5.56, and .300 BLK, covering the full range of common AR chamberings built on full-profile lower receivers.
• The ambidextrous layout makes this a strong fit for team training environments, shared rifles, and any setup where more than one shooter handles the same platform.
• Your Geissele-equipped AR-15 gains a genuine mechanical upgrade that adds faster reset capability without disturbing the precision trigger characteristics you selected that fire control group to deliver.

The Atrius Development Group G-Lever Ambidextrous Forced Reset Selector (ADG-FRS-AMBI-G) for .223, 5.56, and .300 BLK AR-15 platforms is a capable tool and dependable option for the serious AR builder or competition shooter who runs Geissele triggers and demands full ambidextrous forced reset capability in a durable, drop-in package.