Anyone here into firearms?

wstar

Bump-firing can be done on any AR-15 (really, on any semi-auto rifle period, although it's easier on some than others). Once you get the technique down you can pick up anyone's AR-15 and bump-fire at will. What they're selling is a modified stock/grip assembly that's supposed to make it a little easier and more reliable (and probably not beat up your shoulder quite as much).

The general idea with bump-firing a regular AR-15 is you want to leave a small gap between the stock and your shoulder, mostly support the weight with your left hand on the handguard (or forward vertical grip), keep your trigger finger at fixed location in space, and let the recoil of each shot bounce the rifle off of your shoulder and back into your trigger finger.

Some people find it easier to start out this way: Start with the butt against your shoulder and your finger on or just in front of the trigger, and then use your left hand (on the handguard / front grip) to pull the rifle forward into the trigger and away from your shoulder to fire the first round (at which point the same cycle happens as above).

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