UTG Pro RBU6BM Mil-Spec 6-Position Collapsible Stock AR-15/M16

The UTG Pro RBU6BM delivers reliable functionality and proven durability for AR-15 and M16 platform rifles. This mil-spec diameter stock assembly provides six adjustable length-of-pull positions to accommodate different shooting scenarios and user preferences. Built from reinforced synthetic polymer, it maintains consistent lockup under rapid manipulation and heavy use.

What Makes This Different

Unlike basic commercial stocks, this assembly features true mil-spec dimensions with a 1.146-inch inner diameter for proper fitment on standard buffer tubes. The reinforced polymer construction resists impact damage while remaining lightweight at just 8.2 ounces. Each position locks securely with an ambidextrous release lever that operates smoothly even with gloved hands.

Key Features

• Six adjustable positions spanning 3.25 inches of length-of-pull adjustment
• Mil-spec 1.146-inch inner diameter fits standard carbine buffer tubes
• Reinforced synthetic polymer construction weighs only 8.2 ounces
• Ambidextrous release lever accessible from both sides
• Integrated sling attachment point accepts standard QD swivels
• Textured buttpad provides secure shoulder contact
• Matte black finish resists wear and corrosion

Field performance remains consistent across temperature extremes and moisture conditions. The stock locks firmly in each position without rattling or shifting during recoil cycles. Competition shooters benefit from quick length adjustments between stages, while tactical users appreciate the reliable deployment under stress. The textured buttpad maintains consistent placement even when wearing body armor or heavy clothing.

Technical Specs

• Overall length: 7.5 to 10.75 inches (collapsed to extended)
• Weight: 8.2 ounces
• Material: Reinforced synthetic polymer
• Inner diameter: 1.146 inches (mil-spec)
• Adjustment positions: 6
• Finish: Matte black
• Compatibility: AR-15, M16, and similar platforms with mil-spec buffer tubes
• Sling attachment: Integrated QD socket

This stock assembly installs quickly on any mil-spec carbine buffer tube without modification or special tools. The proven design has earned widespread adoption among military contractors and civilian shooters who demand consistent performance. Available inventory ships immediately for builders completing their rifle projects.