- ISMI 1911 Mainspring (Hammer) 17 lbAvailable in 17lb or 19lb. All ISMI Springs are made from silicone chrome instead of 150 year old music wire. Every ISMI spring is heat treated, shot peened & stress relieved to enhance ... 10640
$6.49 - ISMI 1911 Mainspring (Hammer) 19 lbAlso available in 17lb or 22lb. These ISMI Springs are made from a stainless alloy instead of 150 year old music wire.Every ISMI spring is heat treated, shot peened & stress relieved to ... 10641
$6.49 - Plunger Tube SpringThe plunger tube spring regulates the detents. This prevents the slide stop from bouncing up prematurely and gives the thumb safety a secure feel.All ISMI Springs are made from silicone chrome ... 10680
$1.50 - ISMI 1911 Government Round Wire Recoil Spring 9 lbThis spring is intended to be used with 5" Government Model 1911s and 6" 1911s with our 6" Reverse Plugs / Spring Plugs. Not recommended for use with Commander Models without removing multiple ... 10609
$7.95 - ISMI Premium 1911 Firing Pin SpringISMI Premium Extra Power Firing Pin Spring prevents the firing pin from striking the primer when the slide is closed. The heavier spring keeps the firing pin stop from dropping out during firing. ... 10600
$2.99 - ISMI 1911 Government Round Wire Recoil Spring 10 lbThis spring is intended to be used with 5" Government Model 1911s and 6" 1911s with our 6" Reverse Plugs / Spring Plugs. Not recommended for use with Commander Models without removing multiple ... 10610
$7.95 - ISMI 1911 Government Round Wire Recoil Spring 11 lbThis spring is intended to be used with 5" Government Model 1911s and 6" 1911s with our 6" Reverse Plugs / Spring Plugs. Not recommended for use with Commander Models without removing multiple ... 10611
$7.95 - ISMI 1911 Mag Catch SpringIf your pistol is more than 15 years old, you might want to consider replacing this often forgotten spring to ensure your magazine remains in your gun while firing. All ISMI Springs are made from ... 10670
$1.99 - ISMI 1911 Government Round Wire Recoil Spring 1911 7 lbThis spring is intended to be used with 5" Government Model 1911s and 6" 1911s with our 6" Reverse Plugs / Spring Plugs. Not recommended for use with Commander Models without removing multiple ... 10607
$7.95 - ISMI 1911 Government Round Wire Recoil Spring 16 lbThis spring is intended to be used with 5" Government Model 1911s and 6" 1911s with our 6" Reverse Plugs / Spring Plugs. Not recommended for use with Commander Models without removing multiple ... 10616
$7.95 - ISMI 1911 Commander Flat Wire Recoil Spring 12 lbThis flat wire recoil spring for 1911s fits commander guns with full length, 1/4" diameter guide rods. We also use this spring in our Springfield 4" 9mm kit. The 12lb spring weight is perfect for ... 10657
$8.99 - ISMI 1911 Government Round Wire Recoil Spring 12 1/2 lbThis spring is intended to be used with 5" Government Model 1911s and 6" 1911s with our 6" Reverse Plugs / Spring Plugs. Not recommended for use with Commander Models without removing multiple ... 10612
$7.95 - ISMI 1911 Government Round Wire Recoil Spring 1911 8 lbThis spring is intended to be used with 5" Government Model 1911s and 6" 1911s with our 6" Reverse Plugs / Spring Plugs. Not recommended for use with Commander Models without removing multiple ... 10608
$7.95 - ISMI 1911 Government Round Wire Recoil Spring 14 lbThis spring is intended to be used with 5" Government Model 1911s and 6" 1911s with our 6" Reverse Plugs / Spring Plugs. Not recommended for use with Commander Models without removing multiple ... 10614
$7.95 - ISMI 1911 Mainspring (Hammer) 22 lbAlso available in 17lb or 19lb. These ISMI Springs are made from a stainless alloy instead of 150 year old music wire.Every ISMI spring is heat treated, shot peened & stress relieved to ... 10642
$6.49