On a 5 hour busride me and my friend got a little bored. And we came up with this crazy idea...an impulse that has such a low pressure that it runs like a closed bolt gun. We have yet to try it...but the idea is to get two lpr's. On, you set up just like normal. You put another one on, mounted on the asa and buy an extra long tube wrap it around the gun and put it in the back insert where the back guage would go for your first lpr. Therefore when both of the lprs work together the bolt chamber pressure goes down low as crap making it sensitive like a closed bolt gun. Yeah...it's crazy and i doubt it would work.