CMMG Receiver Extension KIT Collapsible
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CMMG
Overview
The CMMG Receiver Extension Kit Collapsible is a complete buffer tube assembly designed for carbine setups. This assembly provides the necessary framework to house a buffer and spring, allowing for the adjustment of the stock length to suit your shooting style and preference. It’s a common choice for builds aiming for versatility and compactness, particularly in tactical or lightweight configurations.
Specifications
August 2026 on GunPartPicker
CMMG Receiver Extension KIT Collapsible ranked #30 of the 64 buffer tube kits builders added on GunPartPicker in August 2026. Builders have been adding it to their builds on GunPartPicker since April 2026. All time, it ranks #43 of the 151 buffer tube kits builders have added.
It was in stock most days in August 2026, and today 2 of the 3 retailers we track have it in stock. It dipped to $79.11 at BattleHawk Armory for a stretch in August 2026, well under its usual $99.95 to $106.89, so sales do come around. Buying today, the lowest price is $99.95 at CMMG, above August's low of $79.11, so a better deal may come back.
Updated · from real builds on GunPartPicker · Prices checked · refreshed daily across 35 retailers
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