Sprinco M4 Blue Enhanced Power Buffer Spring

Manufactured by Sprinco USA
SKU: 25007
MPN: 25007
Manufactured by Sprinco USA
4 Reviews

In Stock

Standard orders will be shipped within the same business day. FFL orders will ship within 2 business days or less as long as we have the information for the transfer destination. Priority shipping methods like Overnight Delivery, Air Delivery, 2nd Day Delivery, or 3 Day delivery do not include Saturday or Sunday as delivery days.



Sprinco AR-15 buffer springs are made from high quality Chrome Silicon wire stock which is used in a variety of applications from Formula One to motor valve springs which can see up to 15,000,000 compression cycles in a single race. This makes it the perfect choice for a carbine which will see far less cycles than that over it’s lifetime. In order for this carbine buffer spring to retain its strength, Sprinco heat treats, shot peens, and treats each spring with a proprietary formula that retains spring efficiency for as long as you have your rifle. The Sprinco enhanced power carbine buffer spring is a great option to improve the long-term reliability of your AR-15.

  • For carbine length buffer tubes and mid-length gas systems
  • Color coded blue
  • Enhanced power
  • Made from chrome silicon wire stock
  • Heat treated and shot peened

This recoil spring is color coded blue indicating that it is optimal for use with 5.56 AR-15s with a mid-length gas system and carbine buffer tube. Sprinco has extensively tested this setup and have concluded that it works great with 5.56 AR-15’s with a barrel length from 12.5” to 16” and either a standard or H2 buffer weight. It also helps you to easily identify which power spring you have in your AR-15 if you have a habit of changing your setup constantly.
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BrandSprinco USA
MaterialSteel - Chrome Silicon

WARNING: This Product can expose you to chemicals which is known to state of California to cause Cancer and Reproductive Harm. For more information, see www.p65warnings.ca.gov

Ratings & Reviews

4 reviews

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Great Product

by -

Great product, nice fit and finish as described. I purchased this for a 10.3" pistol to combine with a H2 buffer. Primary Arms shipped my order the same day I ordered it and I couldn't be happier with my purchase.

Great for smoothing out recoil.

by -

Ordered this spring for my Psa middie along with an h2 buffer and now it feels like a dream, so smooth! Would buy again.

Smooth and the Price is Right

by -

Primary Arms always has fast shipping and gets to me in 2 days. The buffer spring at first was stiff which is to be expected. After 500 rounds it has worked flawlessly. I put it in my new 14.5 mid-length pinned and welded with h2 and did not have a hiccup. Don't recall hearing the twang sound you normally do with regular buffer springs. Was getting around 3 o'clock ejection with 5.56 on a possibly slightly over gassed rifle. Now I need to get one for my 11.5 BCM pistol. Price is right as well and this is a minor upgrade that will go a long way.

This should be standard in all AR’s!!

by -

My CMMG Banshee 45ACP felt like the bolt was getting beat pretty hard. More recoil than it should be having. Added this spring and a H2 buffer here from Primary and my precious Banshee shoots butter smooth now. I always replace any AR buffer spring with a chrome silicone spring. My first one from Sprinco and it works flawless.