JP Enterprises Silent Captured Heavy Recoil Buffer Spring Assembly Gen 2 for AR-15 - Enhanced Performance & Reduced Recoil

The JP Enterprises Silent Captured Heavy Recoil Buffer Spring Assembly Gen 2 is a drop-in upgrade designed to dial in your AR-15's recoil impulse and running behavior without permanent modifications. If you shoot a short-barreled rifle, run a suppressor, or own a piston gun, this captured-spring system addresses the real-world performance gaps in standard buffer setups: reduced friction, quieter operation, and smoother cycling. The core upgrade is the custom-ground spring paired with JP's LMOS buffer design—together they're engineered to eliminate the harsh vibration and clatter you get from conventional springs.

What makes the Gen 2 worth the investment is the heavier buffering mass and the tuning flexibility it brings. The H2 buffer weighs approximately 4.7 oz and combines two tungsten weights with one steel weight for consistent, predictable recoil management across different carbine configurations. The included aluminum guide rod keeps overall assembly weight in check, and a spacer is included so the system works in both M4-style collapsible tubes and longer rifle-length tubes for fixed stocks.

JP built the Gen 2 with modularity in mind. If your rifle runs a bit soft or fast out of the box, you can swap in optional Auxiliary Spring Rate Kits to fine-tune the spring rate without replacing the whole assembly. This is especially useful if your AR lacks an adjustable gas block—instead of guessing at gas settings, you're tuning the buffer itself. Interchangeable buffers also mean you can convert between AR-15 and AR-10 platforms if needed, making this system a solid long-term addition to your AR ecosystem.

Key Features

• Drop-in design—no permanent modifications required
• Custom-ground spring and LMOS buffer reduce friction, vibration, and noise
• H2 heavy buffer (4.7 oz) with two tungsten and one steel weight
• Aluminum guide rod for reduced overall weight
• Spacer included for M4 carbine and rifle-length tube compatibility
• Tunable via optional Auxiliary Spring Rate Kits for optimized performance
• Interchangeable buffer design supports both AR-15 and AR-10 conversion

Specifications

Frequently Asked Questions

Will this fit my AR-15 with a collapsible stock and a rifle-length buffer tube?

Yes. The Gen 2 comes with a spacer that allows installation in both M4-style carbine-length tubes and longer rifle-length tubes, so you can use it in either configuration.

Is this buffer spring system recommended for suppressed AR-15s and SBRs?

Yes. The Gen 2 is specifically recommended for short-barreled rifles, suppressed firearms, select fire rifles, and piston-operated rifles—all setups where standard buffers tend to underperform or cause excessive vibration.

Can I tune the spring rate if my rifle doesn't run quite right?

Yes. You can purchase optional Auxiliary Spring Rate Kits to customize the spring rate of your SCS for optimized performance, particularly useful if your rifle lacks an adjustable gas block.

Can I convert this system to work in an AR-10?

The interchangeable buffer design allows conversion between AR-15 and AR-10 platforms, so you can use compatible buffers to swap between the two with this system.