The JP Silent Captured Spring is one of the best upgrades you can make to your AR-15 platform after a trigger.
It eliminates the springy sound of the regular buffer tube assembly and drastically reduces recoil and sight movement.
When you couple it with a light BCG and a tuned gas block, it can make your rifle 3-gun competition ready, but make sure to get it with the extra springs for extra customization.
Tools Needed
Prices accurate at time of writing
Prices accurate at time of writing
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Installing the JP Silent Captured Spring
Make sure your rifle is unloaded and take apart the upper from the lower. We’ll only need the lower for this mod.
Remove the stock spring and buffer by pressing down on the buffer retainer with something.
The buffer will jump out a little before one of the coils of the spring gets stuck on the buffer retainer. But still, watch out.
Slide in the JP like shown above.
It should retain nicely. Shake it around and see if there’s in/out movement. I found that I had some so I put in one quarter like in their instructions. The rattle went away and everything runs smoothly. The kit also comes with a white plastic block if you’re using a rifle length buffer tube instead of the carbine shown.
How to Tune the JP Captured Spring
Coming soon!
3 Leave a Reply
It’s been 4 years Eric to test and tune your silent capture spring! Well then get your shit together, get it all together and put it in a back pack, all your shit, so its together...And if you gotta take it some where, take it somewhere, you know, take it to the shit store and sell it, or put it in the shit museum. I don't care what you do, you just gotta get it together. Get your shit together. But in all seriousness 4 years! What the hell have you been doing!!!!
Any update on the buffer spring tuning?
I am about to build a 8.3 in barrel .300 blk AR with this spring, a lightweight titanium BCG, and the SA adjustable gas block.
Thanks for the reminder John! I did have to buy the extra pack of springs (so it's better to get it as the combo pack first) and I ended up using the lightest one so that it would hold bolt open. My barrel was 16" mid-length though.