Strike Industries SI Short Pistol Buffer Kit Black 5.5in

The Strike Industries Short Pistol Buffer Kit provides a compact receiver extension solution for AR pistol/PDW platforms. Machined from 7075-T6 aluminum with an anodized finish, this kit includes SI’s tungsten-powder filled buffer and a flat-wire buffer spring to promote reliable cycling over extended service life. The tube features an anti-rotation tab that engages the buffer retainer and an integral QD socket at the rear for push-pull sling setups. Compatibility is listed as standard Mil‑Spec AR-15 lower receivers.

Key Specifications

• The tube is machined from 7075-T6 aluminum for increased strength.
• The finish is listed as anodized for corrosion resistance.
• The buffer tube length measures 5.5 inches.
• The buffer tube outer diameter is 1.247 inches.
• The buffer tube inner diameter is 1 inch.
• The buffer tube weight is approximately 3.7 oz.
• The included buffer is tungsten-powder filled and weighs about 1.8 oz.
• Includes an SI flat-wire buffer spring for consistent cycling.
• Features an anti-rotation tab that locks over the buffer retaining plunger.
• Rear of the tube has an integral QD socket for push-pull sling attachment.

This kit is a practical upgrade for shooters building compact AR pistol or PDW-style platforms who value durable materials and proven cycling components. The combination of a 7075-T6 tube, tungsten-powder buffer and flat-wire spring delivers a dependable, space-efficient receiver extension with user-friendly sling integration and anti-rotation retention.