Strike Industries AR Flat Wire Spring — Pistol Length (ARFWSP)
Model: ARFWSP — UPC: 793811763461
Upgrade the heart of your AR pistol buffer system with the Strike Industries AR Flat Wire Spring (Pistol Length) — a simple, affordable, and high-impact performance upgrade engineered to outlast and outperform stock round-wire springs. Designed for pistol-length buffer systems, this flat-wire spring brings measurable improvements to cycling, longevity, and reliability while remaining a drop-in, do-it-yourself upgrade for builders and gunsmiths alike. strikeindustries.com
What makes flat-wire better than round wire?
Unlike conventional round-wire springs, the flat-wire geometry packs more stored energy into a smaller profile and distributes impact forces over a larger surface area. That translates to:
Increased bolt energy for more positive bolt carrier group (BCG) velocity and reliable extraction/cycling. strikeindustries.com
Lower compressive force per unit area, which reduces spring buckling and friction inside the buffer tube for smoother operation and less wear. Palmetto State Armory
Greater service life, because the broader contact area reduces point-stress and material fatigue compared with conventional round springs. MidwayUSA
Engineered for durability and consistent performance
Strike Industries’ flat-wire springs are manufactured to precise tolerances and are purpose-designed for high-cycle use. Many retailers and product pages note that these springs are cryogenically stress-relieved (where applicable across the SI flat-wire family) to increase spring life, consistency, and resilience under sustained high cyclic rates — giving you a spring that maintains its performance over thousands of rounds. MidwayUSA+1
Drop-in simplicity — install in minutes
One of the biggest benefits of the ARFWSP is how easy it is to swap into your pistol-length buffer system:
No modifications to the buffer tube, BCG, or buffer are required in most standard pistol setups.
Installation is straightforward and reversible, making it ideal for builders who want an immediate performance boost without permanent changes.
Because it’s a direct replacement for the factory spring, the ARFWSP is perfect for both first-time builders and experienced gunsmiths who want a low-risk, high-reward upgrade. strikeindustries.com
Smooth shooting cycle & improved reliability
Users routinely report a smoother shooting cycle with reduced stiction and more consistent bolt velocities, which can improve extraction and reduce the frequency of hiccups during rapid strings of fire. That smoother action also reduces operator fatigue and makes follow-up shots easier to manage — a subtle but meaningful advantage whether you’re working on a range build or a defensive pistol project. Primary Arms+1
Specs & compatibility
Fitment: Pistol-length AR buffer systems (AR-9 / AR-15 pistol builds that use a pistol buffer length). strikeindustries.com
Length / Dimensions: Typical listing shows ~10" overall length for the pistol flat-wire variant (confirm against your specific build before installation). Palmetto State Armory
Material / Finish: High-tensile spring steel formed into flat-wire geometry and treated for durability; sold as a single spring. strikeindustries.com
Model: ARFWSP (Pistol Length) — UPC: 793811763461
Who should consider the ARFWSP?
Pistol builders who want a durable, higher-energy buffer spring without changing buffer weights or geometry.
High-round-count shooters looking to extend service life and reduce replacement frequency.
Competitors and high-rate shooters seeking consistent bolt velocities and reduced spring fatigue.
DIYers and armory techs who want a low-cost upgrade with immediate, tangible benefits. sdsguns.com+1
Installation & care tips
Always follow safe firearms handling practices: clear the firearm and verify it’s unloaded before working on the buffer system.
Inspect the buffer tube and BCG for burrs or damage before dropping in a new spring to avoid premature wear.
If you run unusual buffer weights or non-standard gas systems, test for function and timing; flat-wire springs change spring dynamics and may alter perceived recoil impulse. strikeindustries.com
Why Strike Industries?
Strike Industries built a reputation for practical, innovative upgrades that focus on real-world performance and durable construction. Their flat-wire spring series addresses the wear points and performance limits of legacy round springs by rethinking the spring geometry — a small change with outsized benefits across cycling reliability and longevity. strikeindustries.com+1
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Make your pistol-length AR build smoother, tougher, and more reliable with the Strike Industries AR Flat Wire Spring — Pistol Length (ARFWSP). Small part, big upgrade.
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