Since December, Magpul has been shipping their Dual Tension Carbine Stock to customers and authorised dealers. The DT Carbine Stock, made in the USA, is a versatile replacement buttstock for AR15/M16/M4 carbines and similar platforms with Mil-Spec profile receiver extensions. It combines the best features of the SL and CTR lines, including a new dual tensioning technology for enhanced strength, security, and easy adjustment.