DPM FN 509 Compact MRD Upgraded Recoil Spring 3.7in Barrel Stainless MS-FNH/4. The system includes 4 external springs 2 x 1.0 mm wire diameter and 2 x 1.15mm wire diameter all with different power rates. The soft springs are designed to serve...
DPM FN 509 Compact MRD Upgraded Recoil Spring 3.7in Barrel Stainless MS-FNH/4. The system includes 4 external springs 2 x 1.0 mm wire diameter and 2 x 1.15mm wire diameter all with different power rates. The soft springs are designed to serve...