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This is a two-spring package from Sprinco built around A2 fixed-stock rifle-length setups and VLTOR A5 systems. It brings together the Green standard-power rifle buffer spring and the Enhanced 4-Coil extractor spring, giving you the two most important springs in the cycle in one shot. If you've got a rifle-length or A5 buffer tube and you want your AR to run right for the long haul, this is the pairing to reach for.
The Green buffer spring is color-coded so you always know what's living in your buffer tube. It's built for A1 and A2 fixed-stock rifle-length receiver extensions with rifle-length buffers, and it's become a favorite in the intermediate-depth 7.75-inch VLTOR A5 tubes running 4-inch A5 buffers. Its spring loads match those of a brand-new mil-spec buffer spring, so you get factory-correct cycling without the fade that tired springs bring. It's primarily meant for the lighter calibers like .223, 5.56, 6.8 SPC, 6.5 Grendel, and 7.62×39, though it also finds a home in some longer-barrel setups in heavier chamberings.
Sprinco makes these from chrome silicon wire stock, the same family of material used in Formula One and motor valve springs that survive millions of compression cycles. Each spring is heat treated, shot peened, and treated with a proprietary molybdenum disulfide formulation that keeps it running smoothly and holding its strength for as long as you own the rifle. The result is fewer spring-related hiccups and a bolt that closes with authority instead of that annoying stock spring twang.
The Enhanced 4-Coil extractor spring is tuned to match the load of a new mil-spec spring, making it the go-to choice for 18-inch and longer barrels, especially if you're saving your brass for reloading. It's built for extreme duty and has been documented running past 200,000 cycles, staying unaffected by heat up to 750 degrees. The kit includes the mil-spec extractor insert and Viton O-rings, and it drops in plug-and-play with no modification to your rifle.
The Green spring is made for A1 and A2 fixed-stock rifle-length receiver extensions running rifle-length buffers. It's also very popular in the 7.75-inch intermediate-depth VLTOR A5 tubes with 4-inch A5 buffers. Just note it's built for rifle-length and A5 tubes, not standard carbine M4 tubes.
The 4-Coil version is recommended for barrels 18 inches and longer because it matches the load of a fresh mil-spec spring. That's the sweet spot if you retrieve your brass for reloading, since it grips the case without beating up the rims. For shorter barrels, the heavier 5-Coil Extra Power version is usually the better call.
No modification required. The extractor spring kit is plug-and-play and drops right into your existing AR-15 bolt carrier group. The buffer spring installs the same way any buffer spring does, so it's a straightforward swap.
These are built to outlive the rest of your rifle. Sprinco has documented a single extractor spring running past 200,000 rounds, and the chrome silicon construction with shot peening and moly disulfide treatment keeps the springs holding their strength for the life of the gun. For a lot of folks, this ends up being the last spring set they ever install.
| UPC | 657780250424 |
|---|---|
| Manufacturer | |
| Manufacturer Part Number | 25042 |
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