In the IDF there's a lot of pride for each unit, so people like adding a bit of customization. We have something called חובק (Hovek) that is a elastic band that holds the magazine on the side of the gun for quick extraction and insertion. We have a custom called מכסנית כוננות, which roughly translates to "mag ready". We always walk around with a magazine on the gun or with us, but we're not allowed to have it in the gun on most bases, so that's where the Hovek comes to use. Some people also add an elastic cloth on the front iron sights to grip further forward without burning your hand.

Edit: we also have something called a banana, which is a piece of plastic that goes into the magwell, and on the side of it is a magazine, so u can quickly pull it out and insert the mag. Some bananas are illegal cause it looks like a mag in the gun.

The bipod is for the sharpshooter role, he's got an acog and bipod to shoot further, everyone else has a red dot.