2003 impulse ND rip Valve, ND bolt. bandit bolt as back up, evil pipe. ETC ETC. yadda yadda
love the material that this bolt is made of, much better than stock
Air flow better than stock, but not as good as ND
I tested the Bandit vs stock and the New designz... the New designz performed just a little better 8 to 12 FPS, but the material of the Bandit wins out over the ND. FLIP A COIN. The accuracy seems to be comparable, its much lighter as well than the stock bolt. yadda, yadda yadda yadda
I've seen some sources say Delrin will swell if you get oil on it...So as long as you keep oil away from your bolt I'd go for the New designz.. The pin hole in the bandit could be a little tighter as well, notably sloppier than the ND bolt and the overall finish of the air flow path could be smoother.