Pistol caliber carbines chambered in 9mm, .40 S&W, .45 ACP, and 10mm put considerably more stress on an AR-15 than a traditional gas-operated rifle. An improperly tuned blowback system can cycle too aggressively, causing excessive wear on your fire control components and lower receiver. Running a suppressor only increases bolt velocity and compounds the issue.
BSS 17-4 SS Pistol Caliber Carbine XP Spring - Image 2
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BSS 17-4 SS Pistol Caliber Carbine XP Spring

Original price was: $15.00.Current price is: $10.00.

Important Installation Notice
Proper firearm preparation, inspection, and function testing are required. Never force the device into place or continue using a firearm that displays abnormal, unreliable, or unintended operation.

The buyer is responsible for ensuring that the firearm is properly prepared and that the completed installation functions safely and reliably. Installation and preparation should be performed or inspected by a qualified professional when the buyer is uncertain about any part of the process.
Disclaimer

This product is sold as a builder/aftermarket component. We are not responsible for any injuries, death, property damage, firearm damage, or other losses resulting from improper preparation, installation, tuning, modification, misuse, or unsafe handling.

The buyer assumes all responsibility for proper installation, safe handling, function testing, and compliance with all applicable federal, state, and local laws.
Return Policy

A 30% restocking fee applies to all approved returns of this product.

SKU: BS-174SS-XP-001 Categories: , , ,

Want to know the secret behind getting that stubborn build to finally run? The one that seems like it’ll never cooperate?

Sometimes the answer isn’t another part. It’s controlling where the bolt carrier group wants to go.

This spring leaves your BCG with nowhere else to go but home.

Pistol caliber carbines chambered in 9mm, .40 S&W, .45 ACP, and 10mm are a blast to shoot, but they’re also much harder on an AR-15’s internal components than a traditional gas-operated rifle. An improperly tuned blowback system can slam the action with excessive force, accelerating wear on your lower receiver and fire control components. Adding a suppressor only increases the challenge by driving the action even harder.

That’s where the BSsquirts  Extra Power Recoil Spring comes in.

Manufactured from 17-4 stainless steel, the BSS XP spring provides increased preload over a standard carbine spring. That added spring force helps keep the action closed slightly longer, slowing the initial rearward movement of the bolt and promoting a smoother, more controlled cycling impulse.

Pair it with the proper buffer weight, and you’ll reduce unnecessary abuse on your components while helping your blowback PCC operate the way it was meant to.

XP Spring Features:

  • 17-4 Stainless Steel
  • Optimized for 9MM, 10MM, .40 S&W, .45 ACP, and .308 blowback and AR platforms
  • Increases AR-15’s dwell time in blowback setups
  • Increases Pre-load
  • Quiets action (better for suppression)
  • Reduces felt recoil
  • Designed only for Carbine Length Stock and pistol kits.

When your bolt has nowhere else to go but home, your build has a better chance to perform like it should.

Weight 0.1 lbs
XP PCC 17-4 Stainless Extra Power Recoil Spring

The BSsquirts XP 17-4 Stainless Recoil Spring delivers increased preload over a standard carbine spring, helping delay bolt opening and increase blowback system dwell time. When paired with the proper buffer weight, it provides a smoother, more controlled cycling impulse while reducing unnecessary stress on internal components.

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