The BFSIII™ for HK is a 3-Position Trigger. In position 3 it will fire 1 round on Pull and 1 round on Release. This makes it the fastest semi-automatic trigger on the market. The BFSIII™ is ideal for Tactical and Competition use. The BFSIII™ provides greatly reduced split times between rounds and the ability to place two separate shots into a tighter group. Trigger Operation: Position 1 – Safe –Will not fire. Position 2 – Semi – Fires 1 round per pull. Position 3 – Binary – Fires 1 round on pull and 1 round on release. *  A trigger pull around 4.5 pounds.*  Ambidextrous Safety Selector.*  Safety Selector will fit in two and three position trigger housings. *  Will not work with Ambi Housings*  Trigger housing, ejector, ejector pin and ejector spring are not included.*  Will fit most HK 91, 93, & MP5 variants and clones*  Some firearms may require additional fitting *  MSRP $699.99   Binary Firing System™ waiver and release Warning: Not for civilian sales in CA, CT, DC, DE, FL, HI, IA, IL, MA, MD, MN, NJ, NY, RI, and WA. NEVER ALTER ANY INTERNAL COMPONENT OF THE BFS™. Improper installation, use, or tampering with the BFS™ will void the warranty and MAY LEAD TO UNINTENTIONAL DISCHARGE OF THE FIREARM THAT MAY LEAD TO INJURY OR EVEN DEATH. No refunds will be issued for triggers after installation has been attempted.  By purchasing this product, you are accepting responsibility and liability for the serviceability of the final installation.  AFTER THE BFS™ HAS BEEN PROPERLY INSTALLED, IT IS IMPERATIVE THAT ALL USERS SEEK QUALIFIED TRAINING ON HOW TO USE THESE PRODUCTS.  May require a gunsmith to install.   By purchasing this product, you are accepting responsibility and liability for the serviceability of the final installation. AFTER THE BFS™ HAS BEEN PROPERLY INSTALLED, IT IS IMPERATIVE THAT ALL USERS SEEK QUALIFIED TRAINING ON HOW TO USE By purchasing and/or using the Franklin Armory™ BFS III™, you waive and release any claim for damages, indemnity, or reimbursement against Franklin Armory™ for any claims, fines, or damages imposed upon you for use of the BFS III™. In addition, you agree to release Franklin Armory™ (including its independent contractors, affiliated entities, parent companies, subsidiaries, present and former employees, owners, officers, members, managers, partners, contractors, insurers, shareholders, and directors) from any and all claims, actions, damages, liabilities, losses, costs and expenses (including, without limitation, attorney fees) for death, injury, loss, or damage of property in any way arising out of the purchase and use of the Franklin Armory™ BFS III™. By purchasing and/or using the Franklin Armory™ BFS III™, you agree to limit liability to actual damages arising from gross negligence or willful misconduct of Franklin Armory™. In no event shall Franklin Armory™ be liable for any special, incidental, punitive, or consequential damages or other indirect damages. In addition, you agree to accept responsibility for your use of the product and any consequence or fine imposed upon you by any government entity or third party and to indemnify and hold harm-less Franklin Armory™ for any claims made resulting from your use of the BFS III™.