View cart “PSG1/MSG90 Trunnion Extension Weldment” has been added to your cart. HK MSG90 Adjustable Buttstock Factory New$1,59900 SKU: MSG90STK-1 Categories: MP5 & 90 Series, Services - HK PSG-1 Tags: HK91, MSG90, PSG1 Product ID: 7116 Brand new factory HK adjustable buttstock for the MSG90. Actual item shown. These are getting harder and harder to come by. This is our only one! Contact us if you have questions about builds or assembly. Product is out of stock Notify me when this product is back. Please enter a valid email! Subscribe Description Additional information Description Brand new factory HK adjustable buttstock for the MSG90. Actual item shown. These are getting harder and harder to come by. This is our only one! Contact us if you have questions about builds or assembly. Additional information Weight 21 oz Dimensions 9 × 5 × 1.5 in 922r Qualifying Part YES – Foreign Manufacturer HK Related products HK Type PSG1 Trigger Shoe Kit $4900 HK G3/91 EBO Greek Lower Housing 0 1 F For Semiauto $24900 Out of stock Black Polymer HK Vertical Grip 416 G36 UMP MP5 $3900 Out of stock HK PSG1 MSG90 #30T Locking Piece $24900