Cs Standard Spring Kit-Std Buffer & HD 5-Coil Bolt Extractor Spring
$21.99 at Brownells · 3 stores
In stock
Best price
$19.58at Battlehawk Armory
Sale checked Oct 4, 2026
Where to buy
| Store | Price | Availability | Buy | Add to build |
|---|---|---|---|---|
| Battlehawk Armory Best price | $19.58Salechecked Oct 4, 2026 | Check store | Buy at Battlehawk Armory | |
| AR15Discounts | $19.95checked Nov 10, 2026 | Check store | Buy at AR15Discounts | |
| Dirty Bird | $19.95checked Nov 10, 2026 | Check store | Buy at Dirty Bird | |
| Palmetto State Armory | $21.59checked Oct 2, 2026 | Check store | Buy at Palmetto State Armory | |
| OpticsPlanet | $19.95Salechecked Nov 10, 2026 | Out of stock | Buy at OpticsPlanet | |
| Brownells | $19.99checked Nov 10, 2026 | Out of stock | Buy at Brownells |
Prices and availability change often, so confirm on the store's site before you buy. We may earn a commission from these links.
Price history
Dashed line = out of stock. Tracking since Sep 28, 2026.
Show the prices as a table
| Store | Latest | Lowest | Highest |
|---|---|---|---|
| AR15Discounts | $19.95 | $19.95 | $19.95 |
| Battlehawk Armory | — | $18.96 | $19.58 |
| Brownells | $19.99 | $19.99 | $19.99 |
| Dirty Bird | $19.95 | $19.95 | $19.95 |
| OpticsPlanet | $19.95 | $19.95 | $19.95 |
| Palmetto State Armory | — | $21.59 | $21.59 |
Since Sep 28, 2026.
About this part
The Cs M4 Carbine Reduced Power Buffer Spring is an AR-15 buffer part from Sprinco USA. It's sold by 6 stores, from $19.58 to $21.59.
Fits and works with
- Buffer system
- Carbine · Buffers and springs
Specifications
- Manufacturer
- Sprinco USA
- Type
- Buffer Kit
- Platform
- AR-15
From the manufacturer
Reduced Power Buffer Spring. Sprinco collaborated with two prominent commercial ammunition manufacturers and two prominent gunsmiths to arrive at the design for the Yellow spring. It's approximately 20% lighter than the White spring, and was the consensus choice out of 4 different evaluation samples provided to all parties. They all added in their final evaluations that if a particular gun needed a lighter spring, that the gas port should be enlarged for overall reliability. The Yellow spring is also appropriate for with low power SRTA training or SIMS Rounds for training operations. Mfg: Sprinco Usa
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