When a shot hits an enemy, the Arca Scisco gets the Target Analysis buff. A flat 4%critical chance and status chance bonus are added after mods, stacking up to five times on shots up to 20%. The buff lasts for 2 seconds and can be refreshed. When the buff times out, one stack is lost and the buff duration resets.
Secondary sniper rifle, very useful if you happen to use a short range weapon like a shotgun as a primary.
Puncture and Slash can be a potent combination for Grineer, as the puncture damage will deal bonus to armor while the slash procs will bleed them through the armor itself. Because there is no Impact, this makes slash proc more often compared to standard physical damage weapons with slash as the second or third highest damage amount.
The writing on the side of the weapon seems to translate as "LONG BOLTER".
Arca Scisco in Codex.
Warframe Arca Scisco, HOLY SHIT Its FANTASTIC! - 3 Forma Build thesnapshot
Fixed casting Mesa's Peacemaker Ability unintentionally refreshing the Arca Scisco buff, but not actually increasing the Critical Chance. Casting Mesa's Peacemaker Ability should not activate/refresh the Arca Scisco buff.