The Longbow-DMR, boasting high damage per shot consistent to all ranges' is an ideal long range marksman rifle. Taking two shots to kill a Pilot, or one if it's a headshot (if the suppressor is used, it will take three body shots, and two headshots)
Being a Sniper rifle with the default 6x zoom, this weapon is at home on large, open maps with high vantage points and long sight lines. Finding a good vantage point to take advantage of this weapons strengths is key to success. Staying in position however, is not recommended as enemy Pilots will often close the gap on your location, and will likely engage you in combat situations you are ill equipped to counter. As such, the Cloak ability is highly recommended, as when your location is eventually compromised, you can Cloak and retreat to a safer position to resume providing sniper fire. If you prefer to engage enemies on the ground or in mid range combat, using the alternative sights such as the AOG sight or the 4.5x zoom is recommended, turning this weapon in to a high powered battle rifle of sorts. It is ill advised to use the suppressor for this weapon, as its damage is decreased considerably, taking an extra bullet to kill an enemy Pilot. Though your gun shots won't show on the radar, the semi automatic nature of the weapon and its slow rate of fire (compared to the other pilot weapons) means that your time to kill will be extremely compromised.
After you get a few shots out, it is recommended to Cloak and relocate. If you don't have a silencer, they will come chasing you, so if you relocate and they look for you, you can get a free kill.
The AOG, or Advanced Optical Gunsight, is fixed at 2.4X magnification, and includes an integrated “current magazine capacity” readout with a backup numerical display. The AOG is ideal for combat at extended range.
The Longbow, now simply the DMR, reappears in Titanfall 2 as a sniper-class weapon with a reduced magazine capacity of six. Presumably, this was to further separate its role from that of the G2A5 rifle, and prevent players from seeing it as a comparable battle rifle.