WE OFFER SUPER FAST & FREE 50 STATE SHIPPING & HAVE EXCELLENT FEEDBACK !!!Thanks for visiting ROCK MOUNTAIN TACTICAL ! We are Authorized Full Line dealers for several high quality brands like: Magpul, Ajax Grips, Viking Tactics, GG&G, Eberlestock, Emerson Knives, Savvy Sniper Slings, Wilson Combat & many other excellent name brands. We have 1000s of items in stock: all types of parts and other gear. Please Visit our eBay Store at Rock Mountain Tactical – since 2006. On Time. On Target. NEVER QUIT !!! SPRINCO USA TACTIAL SPRING’s SUPER HIGH QUALITY, PROFESSIONAL RECOIL MANAGEMENT SYSTEMS: Listing is for: (1) Sprinco Tactical Springs Recoil Management System for the GEN 4 – GLOCK 17 – 22 – 31 GENERATION 4 Pistols. – NEW 2018 Kit inlcudes 3 different spings for customizing your platform to fit your needs.*** Includes three (3) Different Chrome Silicon, Moly Plated, Cryogenically Processed Recoil Springs: (1) #17 (RED), #15 (BLUE), #13 (GREEN) ****** NOTE: This Kit is for the GENERATION 4 Glocks as listed and described. ***- This is NOT FOR COMPENSATED – EMAIL questions for INFO on COMPENSATED models.BE ADVISED: PLEASE, PLEASE, PLEASE contact SPRINCO for up-to-date technical information regarding your application before ordering. BE ADVISED: Rock Mountain Tactical will not reimburse you for shipping charges if you order the incorrect part and need to have it exchanged!!! – These recoil management systems are drop-in and have been finely tuned to make the pistol highly reliable & extremely functional increasing accuracy, speed of second (and subsequent) shot return to point of aim. – Highest quality components and attention to detail.- Extremely well designed, tested & performs.- NOTES from Sprinco: Extend the life of your weapon by installing a Sprinco Recoil Management Guide Rod System. – A secondary, or sub-spring assembly, is incorporated onto a heat treated, stainless steel guide rod to cushion the slide to frame impact! All components, including the chrome silicon wire secondary springs, are hand polished to a brilliant finish for reduced friction. – Sprinco’s products are used by many of the top competition shooters in the world, including both World and Multi-National Champions. – Their reliability is validated by their use by Law Enforcement & Elite U.S. Military Forces around the world in combat deployment. – Sprinco USA Recoil Reducers make a significant difference by the management of peak impact forces to the slide /frame interface. The graduated sub-spring is engineered & critically positioned in each model to ensure normal cycling and reliability. – In most models, the spent case has already been ejected prior to slide deceleration. The reduced slide to frame impact results in reduced energy transfer to the grip, wrist, and other extremities (“less felt recoil”), as well as extending the duty cycle of your pistol. – This is a proven, effective, “no frills, no gimmick” approach to recoil management. – Installation is as easy as installing your stock guide rod system. No firearm modification is necessary to enjoy significant reductions in muzzle flip and perceived (felt) recoil. – These systems improve your shooting with faster follow up shots, faster sight recovery & improves control of rapid fire interations. – While you may not be bothered by the recoil of your gun, EXPERT, as well as novice shooters, benefit from faster target acquisition and lowered recovery times between shots, no matter what the situation – REAL WORLD or Shooting Steel or just plain ol’ fun. – Some of the benefits of installing a Sprinco Recoil Management System in your firearm include: – LIFETIME WARRANTY AGAINST BREAKAGE – From Sprinco !!! – Reduces Muzzle Climb – Protects Your Firearm – Faster Sight Recovery – CMP & IPSC Legal – Reduce Felt (Perceived) Recoil – Heat Treated 17-4 Stainless Steel – Chrome Silicon Wire Secondary Springs Never Have To Be Replaced – No Modification to Firearm Required – Non-Mil-Spec Dimension 1911 Rods Modified To Fit Your Gun – FREE: If Requested – Dimensions Are Provided thru Sprinco’s Customer Service.More Info: – Reduces Felt Recoil, Reduces Muzzle Climb & Mitigates Frame Damage from prolonged use enhancing & improving service life & user experience – Drop-in system provides significant reduction in felt recoil & grip fatigue. – Designed to keep the gun sights “flat” during recoil so your sights stay on target to help you shoot more accurately at speed. – Highly polished, stainless steel guide rods fitted with a chrome silicon, secondary spring that reduces slide-to-frame impact with no loss of reliable cycling. – Softens the recoil impulse by gradually slowing the slide to prevent frame battering; this helps extend your pistol’s service life. – Completely reliable. Installation requires no gunsmith modifications to your pistol. – Includes instructions.ANY QUESTIONS? – FEEL FREE TO MESSAGE or EMAIL US !!!Thank you for looking.