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ST Skeleton Tube
STMSRP $114.95 - $419.89The ST Skeleton Tube replaces your standard buffer tube, allowing your stock to fold as flat as possible (with a compatible folding adapter). Made from lightweight, rigid 7075-T6 aluminum,... -
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- 15%- 15%Triangle Stock - Factory Second
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Description
The ST Skeleton Tube replaces your standard buffer tube, allowing your stock to fold as flat as possible (with a compatible folding adapter). Made from lightweight, rigid 7075-T6 aluminum, it’s designed for use with most mil-spec M4-style stocks and braces. It features integrated QD sling sockets that remain accessible even with the stock fully collapsed.
Key Features:
- Adjustable Length of Pull: Select your preferred length of pull
- Compact & Functional: Offers a low-profile setup with easy sling attachment when stock is collapsed.
- Threaded holes for mounting bolt (included)
Note: All skeleton tubes except ST-7 can be adjusted up and down for height
Specifications:
- Crafted from 7075-T6 aluminum with
- Type III Hardcoat Anodizing
Attaching a stock to a pistol creates an SBR, requiring NFA approval. Follow all local/state/federal laws. JMac Customs LLC is not responsible for misuse of products.
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ST Skeleton Tube
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Compatibility
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Weight
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5" (ST-5)
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Fits most M4 style stocks/braces
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2.9 oz
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6" (ST-6)
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Fits most M4 style stocks/braces
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3.1 oz
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7" (ST-7)
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Fits most M4 style stocks/braces
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3.80 oz
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7" Rise (ST-7R)
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Fits most M4 style stocks/braces
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3.90 oz
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FM-SM-1913
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MIL-STD-1913 Receivers and Adapters
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4.48 oz
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SM-4.5
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AK100 Series - 4.5MM Pin / Bulgarian|PSA|Riley
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1.3 oz
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SM-5.5
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AK100 Series - 5.5MM Pin / Russian|KUSA|Saiga
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1.4 oz
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SM-SF
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Arsenal SAM7 with Folding Stock
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1.02 oz
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FM-SM-MRKT
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JMAC IMR MRKT Receiver and MRKT Rear Trunnions
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5.28 oz
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Note: Some M4 style stocks use tension tabs designed for standard buffer tubes to mitigate movement. These will work on our Skeletonized Tubes however, you may experience some wiggle.
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JMac Customs™ offers Black, Green, and Tan finishes, uniquely formulated for our brand. Anodized colors may vary due to batch differences and lighting conditions, making each piece one-of-a-kind. Green and Tan are limited availability and may not always be in stock. By purchasing, you acknowledge and accept natural color variations.