(S)keletonized(T)ube(7)inches long- NO MOUNT INCLUDED

This M4 tube adapter replaces the standard buffer tube to ensure the stock folds as flat as possible! (With proper folding adapter)

Fits most mil-spec M4 style stocks/braces*

Lightweight and Rigid

• Integrated QD Sling Sockets, access with stock completely collapsed
• 7” Length - LOP approximately 8-11.35 inches 
• Compatible with SIG folding mechanisms
• 7075 T6 Aluminum
• Type III Hardcoat Anodized
• Allows 2 bolt installation on MRKT folding mech for ultimate strength

This is not compatible with firearms that need a buffer tube to function

*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. 

Requires a mount or folding mech to install!

Attaching a stock to a pistol makes it an SBR and requires NFA approval. You are responsible for knowing and following your local/state/federal laws!

JMac Customs LLC is not responsible for the end users misuse  of our products.

FM-SM-1913 - 1913 Folding Mechanism

• Clamps on any "1913" or "Picatiny" Rail
• Works with all of our ArmBar, Skeleton Stocks and Skeleton Tubes
• Works with SIG MPX/MCX folding braces/stocks
• Folds Left or Right
• Has 2 height adjustments
• 4140 HT
• Black Nitdride    
• Torque spec: 20 in/lb.
• Adds approx .5" to stock/brace length
• Allows your stock/brace to lock in the folded position

Attaching a stock to a pistol makes it an SBR and requires NFA approval. You are responsible for knowing and following your local/state/federal laws!

JMac Customs LLC is not responsible for the end users misuse  of our products.