SPRINCO USA
Red Extra Power Carbine Buffer Spring
An extra power carbine buffer spring, roughly 25% greater than the White on one of the load constants in the spring design. Color coded red.
The Original
The Red was Sprinco's first AR buffer spring, designed in 2006 for a Force Modernization Team to address spring related M4 reliability problems in the Eastern Asia theatre. Every other spring in the line came after it.
Where It Fits
Commonly used in 9mm, 6.8 SPC, 6.5 Grendel, .450 Bushmaster, .450 SOCOM, .500 Beowulf, and Colt LE6920 carbines. Individual guns deviate depending on port values and the power factor of your ammunition.
The Red also suits moderately gassed .308, 6.5 Creedmoor, and .260 Remington carbines built on AR-10 and SR-25 pattern receiver extensions from Armalite, LMT, LaRue, KAC and similar, using 3.25 inch carbine buffers.
Before You Order
Do not use the Red in DPMS pattern .308 carbines. Those use a standard 7 inch deep M4 extension tube with a short 2.5 inch buffer, and the Orange spring is the correct choice for that platform.
Which Sprinco Spring Do You Need?
Sprinco color codes every spring so you can identify what is in a rifle without pulling it apart. For AR-15 carbine buffer tubes, lightest to heaviest:
- Yellow, reduced power — roughly 20% lighter than White, for Simunition, SRTA, and lightweight competition rifles
- White, standard power — the load of a brand new mil-spec M4 spring
- Hot White, intermediate power — between White and Blue
- Blue, enhanced power — roughly 15% greater than White
- Red, extra power — this one, roughly 25% greater than White
- Orange, extra extra power — stouter than Red, for DPMS pattern .308 carbines
For a rifle length tube, including the VLTOR A5, use the Green rifle length spring.
The Wire
Sprinco springs are made from chrome silicon wire stock, the same material used in Formula One and motor valve springs, where a spring may see up to 15 million compression cycles in a single race. A carbine will see a fraction of that over its life.
Each spring is heat treated, shot peened, and treated with a proprietary formula intended to hold spring rate over time.
What's Included
1x Sprinco Red Carbine Buffer Spring
Specifications
- Extra power
- Approximately 25% greater load than the White spring
- Color coded red
- For carbine length buffer tubes
- Suits AR-10 and SR-25 pattern extensions with 3.25 inch buffers
- Not for DPMS pattern .308 carbines
- Chrome silicon wire stock
- Heat treated and shot peened
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