Haven't played with toys for ages, but have recently got an excellent new man cave and some new equipment.
Check this out.
Still fine tuning the design so this isn't a write up, but it's almost good to go.
I started off trying to do my own Xplorer style breach, which I did but didn't like because it wasn't airtight and there wasn't enough gain for the effort.
Basically it's a kit where you only have to cut 2 tubes to length, and cut the bolt (but not as easy as it sounds).
The rest screws in to existing fixing points.
The kit will have all sorts of bits, including a pusher/bolt alignment tool and a jig to drill your clips (to convert them to stefans) perfectly.
This thing hammers, but is very dart particular.
It's been splitting some types, but one type in particular works well.
Hope you like it.