Sprinco Usa M16 Rifle Cs Buffer Spring Stand-Alone

The Sprinco USA M16 rifle buffer spring is a standard-power rifle-length buffer spring designed to restore reliability and consistent cycling to AR-platform rifles. This green-colored spring is engineered to match the load characteristics of a factory mil-spec buffer spring, making it an ideal replacement or upgrade for shooters running fixed A1/A2 stock configurations or intermediate-depth VLTOR A5 buffer tubes. Whether you're building a new rifle, refreshing an older platform, or diagnosing cycling issues, a quality buffer spring is one of the easiest and most cost-effective upgrades available.

Built for versatility, the Sprinco green spring performs well across common intermediate cartridges including .223 Remington, 5.56 NATO, 6.8 SPC, 6.5 Grendel, and 7.62×39. It also works effectively in longer-barreled rifles (20 inches and up) chambered in heavier rounds like .308 Winchester and 6.5 Creedmoor, though pairing it with heavier buffers—such as an H2 or H3 carbine buffer—may be necessary depending on your specific setup. The spring-alone configuration lets you combine it with your choice of buffer weight and tube type, giving you complete control over your rifle's recoil impulse and reliability profile.

If your rifle feels sluggish, short-cycles, or fails to lock back on empty magazines, a worn buffer spring is often the culprit. Sprinco's reputation for consistent spring performance makes this a trusted solution for shooters who want their rifle to run clean and predictable without breaking the bank.

Key Features

• Standard-power design matches mil-spec buffer spring loads
• Compatible with A1/A2 fixed stock rifle-length receiver extensions
• Works in VLTOR A5 intermediate-depth (7.75") buffer tubes with 4" A5 buffers
• Suitable for .223, 5.56 NATO, 6.8 SPC, 6.5 Grendel, 7.62×39, and longer-barrel applications in .308 and 6.5 CM
• Spring-only design; pair with your choice of buffer and tube

Frequently Asked Questions

What's the difference between rifle-length and carbine buffer springs?

Rifle-length springs are designed for use in rifle-length receiver extensions (buffer tubes). They have different load rates and lengths than carbine springs, which fit in shorter carbine tubes. Using the correct spring type for your tube and buffer configuration ensures reliable cycling.

Can I use this spring in a VLTOR A5 buffer tube?

Yes. The Sprinco green spring is popular in VLTOR A5 intermediate-depth (7.75" deep) buffer tubes when paired with 4" A5 buffers.

What calibers work best with this spring?

The green spring is primary for use with intermediate cartridges such as .223 Remington, 5.56 NATO, 6.8 SPC, 6.5 Grendel, and 7.62×39. It also works in long-barrel (20"+) rifles chambered in .308 Winchester, 6.5 Creedmoor, and .260 Remington, though heavier buffers may be needed for consistent performance.

Do I need to buy a buffer and tube with this spring?

This is the spring only. You'll need to pair it with an appropriate buffer (weight depends on your caliber and setup) and a compatible rifle-length receiver extension (buffer tube). Existing springs that have lost tension or wear can be replaced with this one.