 The marksman version is fitted with a simpler SIG TANGO6 1-6×24 telescopic sight to make quick adjustments between , and it fires M80A1 Enhanced Performance Rounds or XM1158 Advanced Armor Piercing Rounds rather than sniper rounds; it will be fielded with a suppressor to make the marksman less identifiable with louder 7.62×51mm NATO rounds.The SDMR TANGO6 1-6×24 telescopic sight features a red horseshoedot for fast aiming and an illuminated Extended Range Bullet Drop Compensation (BDC) illuminated front focal plane reticle.Roughly 6,000 are planned to be fielded with one per squad in infantry, engineer and scout formations.