It does take experimentation to get the 15-22 to bump fire well. If you have seen my videos you know that I have it firing as fast and flawless as anyone on the net. I have the 3.5# trigger that SlideFire installed along with the recoil enhancer.
I found that greasing the buffer tube helps, having the gun clean and lubed each time you bump fire helps and finally having experimented with every form of ammo available I found that AR Tactical .22 is the final ingredient.
.22 CCI Mini Mags are a close second best when bump firing.
Here is a link to my bump fire videos.
The Professor
- YouTube