Unlike our competitors we took our 30 years of experience tuning  shocks for some of the fastest desert racers in the world and applied it o the Stribog SP9a3! Introducing the 1st of its kind 3/8" to 1/2" shorter stroke recoil damper kit!  Since Grand Power release the 3000 plus serial number Stribog SP9A3 delayed blow back with the US Bolt lock system, recoil hasn't been much better then the SP9A1 which was really disappointing.  We spent countless hours applying our shock tuning skills to the recoil system trying different rubber compounds, secondary rate spring set ups in 19 different rates and configurations only to end up with sub par results that were not worth calling a product.   In the end we were able to find a real solution to completely bring the felt recoil back down to the level of what a delayed blowback should feel like.  Even with high powered ammo) it will give you HANDS DOWN the softest, flattest shooting, and because of the shorter stroke follow up shots are much quicker!  The only thing you feel is the energy of the round much like a higher end PCC like an MP5.  This kit was designed using a Factory SP9A3 & SP9A3S with the factory Stribog lower & bolt stop & trigger (Do NOT use with ANY bianary triggers). Customer also use it in aftermarket lowers and in the SP9A1 Gen 2, but because the bolt is heavier it will not perform as well as it does in the SP9a3, but will out perform any other option out there!   It will NOT work or fit with the dual recoil rod SP9a1! Note: Due to the slow down of the bolt you will notice that the bolt release just slightly harder to release when the bolt is locked back. This is 100% normal.  This is NOT to be used with an cheap HBI buffer or any other buffer, other than the factory BLACK one that the spring rate is designed for. If you choose to do so you run a HIGH risk of having an out of battery detonation. 
PLEASE MAKE SURE THAT YOUR SHIPPING ADDRESS IS CORRECT IN YOUR PayPal OR IT WILL SHIP TO WHATEVER ADDRESS YOU HAVE IT SET UP WITH & IF THE ADDRESS IS WRONG IT WILL NOT ALLOW ME TO SHIP YOUR ORDER AND I WILL CANCEL IT. AFTER YOU FIX IT IN YOUR PP YOU CAN THEN RE ORDER IT. 
 
 
SP9a3 & SP9a3S Aluminum 2 Stage Damper Kit 
Includes:
-One 3/8" CNC Machined Aluminum Spacer/Recoil Spring Carrier for 2 Stage Damper
-One Newer Style Orange Pad To Convert To 1/2" Stroke & To A 3 Stage Damper (These can sometime be cut odd and not look pretty but I can assure you that they work 100% as intended)
-One Secondary Rate Spring
-One Washer
 
These are made to order and are 
If they are ever on sale or says "Pre Order" for less than that its because its most likely a blem. I test fit every single one thats made to test for function before they ship out. 
 
 
 
Disassembly & Install Instructions
 
Disassembly:
Compress factory recoil spring
Remove spring cap and guide rod (Be careful! The Hollow rod is very thin & weak!)
Remove rod assembly from factory buffer and remove the little black washer inside the buffer
Remove the step down spacer from the stock buffer
 
Installation:
 
1st sand stock recoil spring to remove coating
Slide the stock buffer over the recoil spring.. It should move with some resitance but not alot
If its too still remove just a small amount of material out of the bore on the side with the step
If all good then continue with the steps below
Press step down spacer into 3/8" spacer
Re install guide rod (Be careful!  The Hollow rod is very thin & weak!)
Install the new washer only as you will no longer need the small black washer 
Install the pad for 3 stage set up & 1/2" Shorter Stroke (Leave out for 2 stage and for 3/8" Shorter stroke)
Install the stock recoil spring
Slide secondary spring over the recoil spring all the way up against the the 3/8" spacer
Slide the factory buffer over the spring making sure that the larger deeper side of the hole faces the secondary spring
Once you slide it up against the secondary spring compress it all the way agaisnt the spacer to seat a portion of the spring into the stock buffer
Compress the recoil spring, then re install the guide rod end cap (Easiest way is to make sure the guide rod is fully extended then hold the buffer up against you chest in a slightly downward/horizontal position before compressing the spring. This allows the rod to stay extended so that you aren't fighting to compress the spring)
If you need any more assistance feel free to email me at kdgunwerx@gmail.com
Note: (Do NOT try to assemble the stock buffer after assembling the recoil spring guide rod end cap as it will not fit over it!  Do NOT drill out the stock buffer to try to fit it over a pre assembled recoil or you WILL ruin it! )
 
 
NO Refunds or exchanges at anytime! Every single part we sell gets test fit and checked for funtion before it leaves here. Every single firing pin we sell is test fit into a bolt and test fired with a live casing, and then tested for OOB with a live casing before it leaves here. We will not be held responsible if the firing pins dont fit right or still fire OOB in your bolt. KUSA were known for makeing bolts out of spec so that is out of our hands. We are not responsible & will not be held liable for any injuries or death by the use of any of our products. Once products ship it is out of our hands and out of our control we do NOT insure anything unless you request it and pay extra for it. We will not be responsible for lost or stolen parts after they ship! Dont like it pick it up in person or simply dont order. By placing your order you agree to all of these terms!