[Improve trigger speed?]

According to me, For the improvement of the trigger, you should maintain your trigger grip in a controllable recoil with speed and accuracy for precision shooting. And one more thing always adjust your stock.

 

[Faster Trigger Finger?]

To improve your speed or accuracy follow these tips:

 

Right Grip

Dry Firing” is an excellent way to practice
Adust your Stock

try to feather your trigger instead of making distinct hits
And also Practice makes Perfect.

[Improve trigger speed?]

One of the most important aspects of firing accuracy is the trigger pull. Here are some tips for bettering your trigger pull technique: 

• Adust your Stock
• Right Grip
• Try different hand positions
• Dry firing Practice
• And also Practice makes Perfect.

[AR Hand guard choice]

Key-Mod, M LOK or Quad rail.....  What is your preference and why?

[3 Gun free float rail for 3Gun; Evo, Keymod or MLOK]

Keymod handguard system can be incredibly lightweight and allow for the direct attachment of any Keymod-compatible accessories and Mlok free float handguard has a straight opening that the attachment rails can be put into one open slot, or split between two slots to help make an attachment more secure.

[3 gun Handguard options]

G3 M-LOK free float handguard is lightweight design. This design saves weight due to the milled rails on the 3,6,9 o'clock position. This allows for even more control of your weapon. This handguard profile has been designed to wrap over the top of the barrel to protect the shooter's hand.
 

[What is the best free float hand guard and why?]

15 inch m lok handguard offers excellent flexibility. This hanguard is one of the best in the market with optimal weight reduction.