P90’s are the Standard weapon used by SG-1 (for half the series) and the Atlantis Expedition. I’ve always found them a pretty cool gun. My friend agreed, so we decided to make one out of Lego. It came out really well. We ended up using a canon for the firing mechanism. The original mechanism, wasn’t trigger activated, so it didn’t work that well. The theory was sound though and it would’ve been great with the right parts. It would have even been fully automatic! Unfortuantely we didn’t have those parts.