Designed and created to fulfill the definition of a civilian pistol, the SP5 is loaded with reliable features, like a Navy barrel with threaded tri-lug adaptor, paddle magazine release, and fluted chamber. I also installed this on my MP5SD .22LR (New Umarex), I used about half an hour with https://stag-15-tactical-lh-qpq-135790.daneblogger.com/17150729/the-definitive-guide-to-6-5-magazine-extensions-from-bulk-edit-6-5-magazine-extensions