Armaspec 45/90 Degree Short/Full Throw Ambidextrous Safety Selector Black. One of the top upgrades you can make is by installing the Armaspec ST45 Abidextrous Safety Selector. This is a short/full throw safety which means you can set it to require either a 45 degree or 90 degree turn to engage or disengage the safety lever depending on your preferences. By having the ability to swap the degree you can set your firearm to be more tactical or standard giving you full control over how you plan to use it. Specifications for Armaspec 45/90 Degree Short/Full Throw Ambidextrous Safety Selector: Manufacturer: Armaspec Gun Make: AR Platform Gun Type: Rifle Gun Model: AR-10 AR-15 Hand: Ambidextrous Condition: New Country of Origin: USA Features of Armaspec SFT45/90 Ambidextrous Safety Selector: Ambidextrous Operation Ability to Set 45 or 90 Degree Rotation Crisp Lockup Package Contents: Armaspec 45/90 Degree Short/Full Throw Ambidextrous Safety Selector What firearm models does the manufacturer say Armaspec 45/90 Degree Short/Full Throw Ambidextrous Safety Selector is compatible with? The manufacturer says that Armaspec 45/90 Degree Short/Full Throw Ambidextrous Safety Selector is compatible with AR-15 AR-10Armaspec ARM113-BLK: 45/90 Degree Short/Full Throw Ambidextrous Safety Selector Black