The CTR (Compact Type Restricted) polymer buttstock features a unique design with a 3-1/2" length of pull adjustment. Requires the use of a mil-spec carbine-length extension tube, buffer and spring (sold separately). The stock also features a friction lock system which eliminates play and creates a solid link between the stock and the extension tube.
- Buffer tubes come either as Mil-Spec or Commercial diameter. The Mil-Spec buffer tube is 1.148" in diameter while the Commercial buffer tube is 1.168" in diameter. The standard is Mil-Spec and Commercial stocks and buffer tubes are usually described as such.