J P Enterprises167529518
308 Ar Silent Captured Spring Gen 2 H2 W/ Alt Pack$208.00
Availability: In Stock
The JP Enterprises AR-15 Silent Captured Spring Gen 2 H2 with Alternate Pack is a drop-in recoil management system designed to smooth out the action of your rifle while cutting the noise that comes from standard buffer springs. If you've ever cringed at that metallic grinding sound during dry fire or a string of shots, this captured-spring setup eliminates it. The Gen 2 uses a custom-ground spring paired with JP's LMOS buffer to drastically reduce friction and vibration—no permanent modifications to your lower receiver required. Just swap it into your existing buffer tube and you're done.
The H2 variant ships with a heavier buffer than standard setups, loaded with two tungsten weights and one steel weight for a total of approximately 4.7 oz. That extra mass is tuned for short-barreled rifles, suppressed builds, and piston-operated guns—situations where bolt bounce and spring noise are most noticeable. The included spacer lets you run this system in both carbine-length and rifle-length buffer tubes, so whether you're building with a collapsible M4-style stock or a fixed rifle stock, it'll fit. The aluminum guide rod keeps weight down compared to older designs.
One of the smartest features here is the ability to tune spring rate to your specific rifle using JP's optional Auxiliary Spring Rate Kits. The default spring covers most builds well, but if you're running a rifle without an adjustable gas block or want to dial in performance, swapping springs lets you optimize feel and function without major work. Interchangeable buffers also mean you can convert between AR-15 and AR-10 platforms if your collection grows.
| Platform | AR-15 |
| Buffer Type | H2 (Heavier) |
| Buffer Weight | Approximately 4.7 oz |
| Buffer Composition | Two Tungsten weights + one Steel weight |
| Compatibility | Carbine-length (M4) and rifle-length buffer tubes (spacer included) |
| Installation | Drop-in; no permanent modifications |
| Guide Rod Material | Aluminum |
The Gen 2 H2 is designed to work with both carbine-length buffer tubes (standard M4-style collapsible stocks) and rifle-length tubes. An included spacer allows installation in either configuration, so measure your tube before purchase to confirm fit.
Yes. The heavier H2 buffer with tungsten weights is specifically recommended for suppressed firearms, along with short-barreled rifles, select fire rifles, and piston-operated guns. The added mass helps manage the increased rearward impulse that suppressors create.
Yes. JP offers Auxiliary Spring Rate Kits that let you swap springs in the captured-spring assembly to dial in performance for your specific rifle configuration. This is particularly useful if your build lacks an adjustable gas block for tuning.
The package includes the Gen 2 H2 captured-spring assembly with the custom-ground spring, LMOS buffer, aluminum guide rod, and a spacer to accommodate both carbine and rifle-length buffer tubes.
SKU: 167529517 • Weight: 0.7oz
Availability: In Stock
The JP Enterprises AR-15 Silent Captured Spring Gen 2 H2 with Alternate Pack is a drop-in recoil management system designed to smooth out the action of your rifle while cutting the noise that comes from standard buffer springs. If you've ever cringed at that metallic grinding sound during dry fire or a string of shots, this captured-spring setup eliminates it. The Gen 2 uses a custom-ground spring paired with JP's LMOS buffer to drastically reduce friction and vibration—no permanent modifications to your lower receiver required. Just swap it into your existing buffer tube and you're done.
The H2 variant ships with a heavier buffer than standard setups, loaded with two tungsten weights and one steel weight for a total of approximately 4.7 oz. That extra mass is tuned for short-barreled rifles, suppressed builds, and piston-operated guns—situations where bolt bounce and spring noise are most noticeable. The included spacer lets you run this system in both carbine-length and rifle-length buffer tubes, so whether you're building with a collapsible M4-style stock or a fixed rifle stock, it'll fit. The aluminum guide rod keeps weight down compared to older designs.
One of the smartest features here is the ability to tune spring rate to your specific rifle using JP's optional Auxiliary Spring Rate Kits. The default spring covers most builds well, but if you're running a rifle without an adjustable gas block or want to dial in performance, swapping springs lets you optimize feel and function without major work. Interchangeable buffers also mean you can convert between AR-15 and AR-10 platforms if your collection grows.
| Platform | AR-15 |
| Buffer Type | H2 (Heavier) |
| Buffer Weight | Approximately 4.7 oz |
| Buffer Composition | Two Tungsten weights + one Steel weight |
| Compatibility | Carbine-length (M4) and rifle-length buffer tubes (spacer included) |
| Installation | Drop-in; no permanent modifications |
| Guide Rod Material | Aluminum |
The Gen 2 H2 is designed to work with both carbine-length buffer tubes (standard M4-style collapsible stocks) and rifle-length tubes. An included spacer allows installation in either configuration, so measure your tube before purchase to confirm fit.
Yes. The heavier H2 buffer with tungsten weights is specifically recommended for suppressed firearms, along with short-barreled rifles, select fire rifles, and piston-operated guns. The added mass helps manage the increased rearward impulse that suppressors create.
Yes. JP offers Auxiliary Spring Rate Kits that let you swap springs in the captured-spring assembly to dial in performance for your specific rifle configuration. This is particularly useful if your build lacks an adjustable gas block for tuning.
The package includes the Gen 2 H2 captured-spring assembly with the custom-ground spring, LMOS buffer, aluminum guide rod, and a spacer to accommodate both carbine and rifle-length buffer tubes.
SKU: 167529517 • Weight: 0.7oz