This set of MicroFit™ Takedown Pins includes both the front pivot pin and rear takedown pin for a small-frame receiver set. Oversized pins will remove much if not all of the slack in a loose receiver set while undersized pins will help with easier takedown of overly tight receivers like those with excess finish buildup.

Heat Sink for JP .750" Contour Barrels - Long

6061 aluminum, 7 3/8" length, set of two halves with hardware

Weight: 5.1 oz.

Silent Captured Spring (patented)
9mm AR Enhanced Version

The 9mm Silent Captured Spring is a drop-in component that softens recoil and reduces cycling noise and vibration in your 9mm carbine. The result is a refined rifle that's a pleasure to shoot. Paired with our 9mm bolt assembly, you have the most reliable 9mm operating system available.

The 9mm Enhanced Version provides the same buffering mass as our standard 9mm SCS. At the same time, we've increased overall bolt mass slightly with more room for increased weight if needed. The result is even softer recoil thanks to a further delay in blowback.

The Enhanced Version 9mm SCS is the best option for reliability and durability with hotter ammunition. It's also the best pairing for use with non-JP bolt assemblies where a central mass needs to be removed. Removing this mass reduces overall reliability from the operating system, which can be offset by the addition weight in the SCS.

Package includes spring and instruction sheet.

Features:

• Simple, drop-in installation
• Quieter, smoother operation thanks to reduced vibration and friction
• Softened recoil, both felt and actual
• Completes the roller-bearing-like perfection of the JP operating system
• Sufficient deadblow effect to avoid bolt bounce
• Mass tunable via alternate masses
• Enhanced reliability and durability when shooting hotter loads
• Best SCS option for use with non-JP 9mm bolt assemblies
• American made

GEN 2 AR-15 Silent Captured Spring Builder with Alternative Spring Pack

H2 Buffer Version

Includes SCS unit, five alternative weight springs and spacer to allow for installation in both carbine- and rifle-length buffer tubes.

Recommended Use:

• Short-barreled rifles (SBRs)
• Suppressed weapons
• Rifles recommended to use an H2/H3 buffer
• Select-fire rifles
• Piston-operated rifles

GEN 2 AR-15 Silent Captured Spring Builder with Alternative Spring Pack

Standard Version

Includes SCS unit, five alternative weight springs and spacer to allow for installation in both carbine- and rifle-length buffer tubes.

GEN 2 Silent Captured Spring (patented) for AR-15-type rifles

H2 Buffer Version

Includes spacer to allow for installation in both carbine- and rifle-length buffer tubes.

Recommended Use:

• Short-barreled rifles (SBRs)
• Suppressed weapons
• Rifles recommended to use an H2 buffer
• Select-fire rifles
• Piston-operated rifles

GEN 2 AR-10 Silent Captured Spring Builder with Alternative Spring Pack

H2 Buffer Version

Includes partially assembled SCS unit, three alternative weight springs and spacer to allow for installation in both carbine-length and rifle-length buffer tubes.

Recommended Use:

• Short-barreled rifles (SBRs)
• Suppressed weapons
• Rifles recommended to use an H2 buffer
• Select-fire rifles
• Piston-operated rifles

GEN 2 AR-10 Silent Captured Spring Builder with Alternative Spring Pack

Standard Version

Includes partially assembled SCS unit, three alternative weight springs and spacer to allow for installation in both carbine-length and rifle-length buffer tubes.

GEN 2 Silent Captured Spring (patented) for AR-10-type rifles

H2 Buffer Version

Includes spacer to allow for installation in both carbine- and rifle-length buffer tubes.

Recommended Use:

• Short-barreled rifles (SBRs)
• Suppressed weapons
• Rifles recommended to use an H2 buffer
• Select-fire rifles
• Piston-operated rifles