- M4A1's normal attacks can miss and can crit.
- M4A1's cannon attacks cannot miss and cannot crit on the main target. It does not ignore armor.
- Her splash damage can miss and can crit.
So, should she use a PEQ at night? Let's make a table.
| Scope | Normal shots | Cannon shots | Cannon splash |
|---|---|---|---|
| PEQ | Deals damage normally | Deals damage normally | Deals damage normally |
| VFL | Deals minimal damage due to misses | Deals damage normally | Deals minimal damage due to misses |
| EOT | Deals minimal damage due to misses | Deals damage normally (+some FP, -some ROF) | Deals minimal damage due to misses |
PEQs are equal or better to the other options across the board. Use them. I guess VFLs are technically usable if exclusively shooting stuff with 0 EVA, but that's not very likely.
If available, her mod SPEQ is preferred. Even if not taking advantage of its armor, it provides a similar DPS boost to her cannon shots as a chip would and has a significant advantage in allowing her normal shots/splash to deal more crit damage.