It might be just a tad OP

HeadSh0t 5: +20% Critical Hit Damage.

0ptics 5: +15% Zoom and +60% Aim Steadiness (reduces aim disruption when taking damage).

Killer 5: Kill Skill. Killing an enemy gives you +50% Critical Hit Damage and +75% Reload Speed for a few seconds.

Precisi0n 5: +25% Accuracy.

0ne Sh0t 0ne Kill 5: The first shot from a fully loaded magazine deals +60% Damage.

B0re 1: Shots pierce through enemies, gaining +100% damage per enemy pierced. Enemy crit locations highlighted in Decepti0n.

Vel0city 5: +100% Bullet Speed, +15% Critical Hit Damage, and +10% Gun Damage.

Kill C0nfirmed 5: Up to +40% Critical Hit Damage depending on how long you aim down the sights.

At 0ne with the Gun 5: +125% Hip-Shot accuracy, +50% Reload Speed, and +5 Magazine Size with Sniper Rifles.

Critical Ascensi0n 1: Scoring a Critical Hit with a Sniper Rifle gives you +6% Critical Hit Damage and +5% Damage with Sniper Rifles. Can stack up to 999 times. Stacks begin to decay if you haven't scored a critical hit in a while.

Markswoman Critical Hit Damage: +30%; Aim Speed: +100%

Only the Best
Bullet Speed: +100%; Magazine Size: +5

Culling the Herd Gun Damage: +30% Long-Range Killer
Bonus Damage: Up to 60% of weapon damage; "You can run, but you'll only die tired"

Warning Shot Fire Rate: +35%; Accuracy: +45%; Critical Hit Damage: +35%; Weapon Swap Speed: +50%

Silver Lining
"One doesn't need to be taught fear when one is the hunted."

I Never Miss
Sniper Rifle Critical Hit Damage: +3.5% per stack; Max Stacks: 999

Magic Bullet
Health Regeneration: Up to 25% of Max Health / sec.; Healing Nova: Up to 7.5% of Max Health

Wait for It...
Sniper Rifle Damage: +7.5% per stack; Max Stacks: 999 Large Caliber Gun Damage: +50%; Reload Speed: +25%; Magazine Size: -43%

Prudent Prudence Movement Speed: +30%; Reload Speed: +40%; Weapon Damage: +30%

Custom Loads Bonus Elemental Damage: 30% of damage dealt; Critical Nova Damage: 15% of damage dealt; "Hunting is not a sport. In a sport both sides should know they're in the game."