FN FN-15 Rifle Buffer Tube Kit

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FN FN-15 Rifle Buffer Tube Kit: Reliable Recoil Control for AR-15 Builds

Upgrade your AR-15’s recoil management with the FN FN-15 Rifle Buffer Tube Kit. Designed for durability and consistent performance, this mil-spec kit ensures proper cycling for rifle-length gas systems. Whether you’re building a new rifle or replacing worn components, it’s a no-nonsense solution backed by FN’s reputation for quality. Ships discreetly to all 50 states.

Key Specifications

• Material: 7075-T6 aluminum buffer tube, hardened steel components
• Finish: Type III hardcoat anodized (matte black)
• Compatibility: Rifle-length stocks (A2, fixed, or collapsible with adapter)
• Includes: Buffer tube, castle nut, end plate, rifle buffer spring, carbine buffer (H2 weight)
• Weight: 14.8 oz (complete kit)

Feature Breakdown

The buffer tube’s 7075-T6 aluminum construction withstands heavy use without deformation, a critical factor for sustained fire or rapid cycling. Unlike commercial-grade tubes, this mil-spec design maintains tight tolerances to prevent stock wobble. The anodized finish resists wear from sling attachments or storage in humid environments.

Included H2 buffer (4.6 oz) balances recoil mitigation with reliable bolt carrier group timing, particularly in mid-length or rifle-gas systems. The carbine-style buffer allows compatibility with most aftermarket stocks while the rifle spring reduces bolt bounce. Together, these components reduce felt recoil and muzzle climb during rapid strings of fire.

Installation requires no specialized tools beyond an armorer’s wrench for the castle nut. The end plate features positive detent engagement to prevent rotation under recoil. All threads are properly staked from the factory to avoid loosening during extended use.

This kit is ideal for builders who prioritize function over flash. It omits unnecessary branding or decorative cuts that compromise strength. The components arrive pre-lubricated with a corrosion-inhibiting grease, ready for immediate installation.

Compatibility Notes

• Fits standard AR-15/M16 lower receivers (mil-spec)
• Designed for rifle-length buffer systems (not compatible with pistol braces)
• Works with most aftermarket rifle stocks (A2 profile required)
• Not recommended for short-barreled rifles (under 14.5″) without adjustable gas block

Installation Overview

1. Secure lower receiver in vise block. 2. Install buffer spring into tube. 3. Thread tube into lower until flush, then tighten castle nut to 35-40 ft-lbs. 4. Stake castle nut at 12 o’clock position using punch. Total install time: under 10 minutes with basic tools.

FAQ

Q: Does this work with carbine stocks?
A: No – this is a rifle-length tube. Use carbine buffer kits for collapsible stocks.

Q: Is the H2 buffer suitable for suppressed fire?
A: It helps mitigate gas blowback but may require tuning with an adjustable gas block.

Q: Can I use this for a 9mm AR build?
A: Not recommended – pistol-caliber buffers require different weights.

Q: Does FN warranty this product?
A: Yes – lifetime coverage against manufacturing defects.

Q: Are shipping times affected by state laws?
A: No – we ship to all 50 states within 2 business days.

Warranty & Shipping

All FN parts include a lifetime manufacturer warranty. Ships via USPS Priority Mail with tracking. No signature required for delivery. Contact us within 30 days for return authorization on uninstalled items.

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