The weak aspect hand placement operates without a special thumb relaxation. Thumb rest from Ronni works on MCK If you would like. Shoulder strap attaches on either. No pistol brace extension desired. MCK works by using pistol's slide launch so no mal-functions like Ronni. The one thing the Ronni has https://recover-tactical53963.daneblogger.com/25831284/5-essential-elements-for-sage-ts870r