Got this one as a gift. Still new in sealed box.
The model number is #ACBK-2CT. (Carbine Collapsible Clubfoot Modstock in Tan)
This is the description from Vltor's web site:
Combo-kit with two Long Accessory Compartments, but minus Cheek Weld Adapter and QD Sling Swivel.
Kit includes: 5-position Receiver Extension, Buffer, Spring, Receiver Lock-Plate and M4 Lock Nut. Lock-Plate and M4 Lock Nut.
Vltor sells it at $159.95. I will let it go for $148.00 SHIPPED
Accept M/O and PayPal (+3.5%)