Sprinco M4 Blue Enhanced Power Buffer Spring
- 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.
Ratings & Reviews
by Kyle -
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 Paul -
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 Brandon -
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 Damon -
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.