Almost every AR-style rifle has long Picatinny rails atop, below and to the sides of the barrel, allowing you to mount optics, lights, lasers and other accessories.

The Deluxe .22 Doetail Rings with Picatinny TriRails has a versatile TriRail Ring System that fits all Weaver/Picatinny bases and fits all one-inch tube scopes up to 56mm objective.

It's hard to mount optics to an old-school AK (new ones seem to have more Pic rails integrated into them), but there are ways to retrofit attachment points to get on target quicker.

The Inteliscope Tactical Rifle Adapter and app allows gun owners to mount their iPhone or iPod ... or Weaver tactical rail. 3 / 6. ... attach and release from a Picatinny (Mil-STD-1913) or Weaver ...

Firefield Rival Foregrips are here to help improve your accuracy with two different models; with one for Picatinny rails (FF35004) and one for KeyMod rails (FF35005).