DoubleTap 是一款由美國雙連擊防務有限責任公司所研製及生產、專為個人防護用途的雙管式德林加手槍，有發射 919 毫米帕拉貝倫與45 ACP 口徑自動手槍子彈的版本。 該槍的名字來自於雙連擊（Double tap）射擊技巧，對攻擊目標的同一位置（或非常接近的位置）之上在短時間內連續射出兩發子彈。海澤防務已表示，他們汲取了來自 FP45「解放者」的靈感，該槍曾是二戰期間為供反抗納粹德國的法國游擊隊、反抗勢力使用而設計的武器。 雖然 DoubleTap 確實具有兩根槍管，兩發子彈卻不可同時發射，以免在美國菸酒槍炮及爆裂物管理局（ATF）規定下因被視為任何每次扣動扳機發射多於一發的武器而被定義為機槍。DoubleTap 在第一次扣下扳機而發射第一發子彈以後，第二次扣下扳機並發射第二發子彈，進而達成雙連擊。 設計 DoubleTap 的獨特之處在於其兩個膛室各自裝填的一發子彈，即每根槍管各一發。它還可在握把攜帶有兩發額外的子彈用以重新裝填。其雙手靈巧的拇指操作式閂鎖可釋放槍機並且丟擲空彈殼，用以裝填兩發備用彈。 該武器設有正在申請專利的雙動操作滾珠軸承扳機系統。其他功能還包括由鈦或鋁製成的軍用規格底把和，防絆的設計以便抽出武器。 生產 DoubleTap 在市場上最初是以海澤 DoubleTap（Heizer DoubleTap）的名字銷售，但在 2012 年 10 月，雙連擊防務有限責任公司宣佈他們正在尋找製造手槍的新合作夥伴。11 月 7 日發布的一份宣告中，海澤防務表示，與 DoubleTap 的創造者的業務關係從來沒有被物化為經濟學提出的 沒有預測成功的商業合作關係。 一個月後，它宣佈位於佛羅里達州那不勒斯市的方位角科技公司（Azimuth Technology）被選中以製造手槍。 參見 COP 357 德林加手槍 HK P11 手槍 蘭卡斯特手槍 SPP1 水下手槍 Piexon JPX4 胡椒手槍 資料來源 參考文獻 《輕兵器》雜誌 2014 年 9 月下號：品評 Double Tap 手槍 外部連結 Official Website Instruction Manual The Firearm Blogcom－ Heizer Defense DoubleTap 45 Pistol Heizer Defense Double Tap DoubleTap Pistol Production Canceled DoubleTap Dramas DoubleTap Tactical Pocket Pistol Now Shipping For Real Heizer Defense files lawsuit against Doubletap Defense DoubleTap Defense Pocket Pistol Now in 40 SW Conversion Kit Also Available DoubleTap Training Grip Heizer Defense Pocket AK and Pocket Sniper 308 Due Soon The Truth About Gunscom－ New Gun Maker Heizer Announces DOUBLETAP 45 Pocket Pistol Is The Heizer DOUBLETAP The Worlds Thinnest Handgun Heizer DoubleTap Picture Becomes A Little Clearer Which Heizer DoubleTap Should TTAG Test Heizer DoubleTap HandsOn Heizer Readies Accessories for DoubleTap Mania Heizer Introduces Winter Combat DoubleTap Model Heizer DoubleTap In Action Is Mr Derringer Ready for His CloseUp Heizer DoubleTap Delayed Again Kohout Finds a New Manufacturer for DoubleTap DoubleTap Sues Heizer Over Breakup DoubleTap Cranks Up Production Doubletap to Ship Within 23 Weeks DoubleTap Is Shipping Guns Really Gun Review DoubleTap Tactical Pocket Pistol DoubleTap Tactical Pocket Pistol Update WGWYG Which Gun Would You Grab Kahr PM9 vs DoubleTap New from DoubleTap Defense 9mm and 45 Conversion Kits DoubleTap Adds 41045 Colt and 40 SW Question of the Day Do You Carry a Backup Gun Why Not American Rifleman 7 Reasons Why Pocket Pistols Are Uh Less Than Ideal Guns for Beginners Smaller and Lighter are Not Always Better Guns Ammocom Introducing the Diminutive Heizer DoubleTap PalmSize TwoShooter The Heizer DoubleTap Review Is This The First IPistol Hedy Jane Pocket Pistol Finished in IPhone White TacticalLifecom Heizer Defense DoubleTap Heizer Defense DoubleTap at 2012 SHOT Show video Hedy Jane DoubleTap DoubleTap derringer delayed seeks new manufacturer DoubleTap Defense chooses Floridabased Azimuth Technology to manufacture the DoubleTap concealed carry pistol Gun Review DoubleTap Pocket Pistol DoubleTap 45 ACP Pocket Pistol Gun Preview 10 DoubleTap 45 ACP Features Personal Defense Worldcom DoubleTap Defense Pocket Pistol DoubleTap Pocket Pistol Gun Review DoubleTap Defense Tactical Pocket Pistol VIDEO DoubleTap Pocket Pistol 9mm 45 ACP Handgun Preview CrossBreeds New Holsters for the DoubleTap Pocket Pistol DoubleTap Defenses 9mm45 ACP Pocket Pistol Gun Review DoubleTap Defense Pocket Pistol in 9mm 45 ACP American Riflemanorg Update on the DoubleTap Pistol DoubleTap Back On DoubleTap Receives Patent Category 單發手槍 Category 多管槍械 Category 美國槍械 Category9 毫米魯格彈槍械 Category45 柯爾特自動手槍彈口徑槍械