Atrius Development G-Lever Ambidextrous Forced Reset Safety - Geissele Specific Black. The G-LEVER is an Ambidextrous FRS that comes with a Lever Blocker designed to keep your cam lever from over-rotating beneath the trigger group's hammer. The Lever Blocker is made of aluminum and is black nitrided to combat wear or corrosion. Atrius Development Group's G-LEVER is compatible with Geissele SSA SSA-E and G2S triggers. (Please Note: The Geissele "X Series" are currently not compatible) Atrius Forced Reset Selectors (FRS) are compatible with mil-spec/full-profile AR15 (chambered in .223/5.56/.300 BLK) fire control groups with no modifications required. Specifications for Atrius Development G-Lever Ambidextrous Forced Reset Safety - Geissele Specific: Manufacturer: Atrius Development Color: Black Finish: Corrosion Resistant Gun Make: AR Platform Gun Model: AR-15 Fabric/Material: 4140 Steel Hand: Ambidextrous Caliber: 5.56x45mm NATO .300 AAC Blackout .223 Remington Features of Atrius Development G-Lever Ambidextrous Forced Reset Safety - Geissele Specific Drop-In Installation Swap out your factory safety in minutes and experience the next level of firearm manipulation (some fitment may be required). Runs with Mil-Spec Fire Control Groups Seamlessly integrates with standard AR fire control groups ensuring flawless function and longevity without modification. Hardcore Durability Crafted from heat-treated 4140 steel and coated in a corrosion-resistant finish the Atrius FRS laughs in the face of wear and tear. Rain mud sweatit eats it all for breakfast. Mechanically Leveraged Design Atrius's Forced Reset Selector (FRS) reduces wear on your rifle preserving your weapons longevity unlike forced-reset triggers (FRTs) that accelerate internal component degradation. Ultra-Smooth Engagement Crisp tactile clicks with no mushy nonsense. Designed for 90-degree throw engagement. Positive Positioning Without Slippage Engineered for rock-solid engagement eliminating the risk of unintentional movement mid-fire keeping you in full control at all times. Aggressive Ergonomics Textured chamfered and purpose-built for speed. Your thumb finds the selector instantly even under stress with no fumbling no hesitationjust pure control. Package Contents: Atrius Development G-Lever Ambidextrous Forced Reset Safety - Geissele Specific What firearm models does the manufacturer say Atrius Development G-Lever Ambidextrous Forced Reset Safety - Geissele Specific is compatible with? The manufacturer suggests that Atrius Development G-Lever Ambidextrous Forced Reset Safety - Geissele Specific is compatible with AR-15Atrius Development ADG-FRS-AMBI-G: G-Lever Ambidextrous Forced Reset Safety - Geissele Specific Black