JP's pursuit of perfection didn’t stop with springs though and led ultimately to the creation of the JPSCS™ Silent Captured Spring, new for 2012. Maintaining all the benefits of our polished buffer springs and proprietary LMOS™ buffer, this combination buffer_spring assembly eliminates the friction of standard buffer components resulting in outstanding smoothness and sound abatement. What’s more, the spring is removable from the assembly for custom tuning, and both the AR_15 and AR_10 versions of the JP Silent Captured Springs are functional in rifle_ and carbine_length operating systems. The AR_15 version fits and functions in any gas_operated AR_15 variant, regardless of caliber and the AR_10 version should fit and function in any large_frame AR_10_type platform. The JPSCS is not compatible with any 9mm AR variant or any blowback system using a solid weighted carrier.
Includes spacer to allow for installation in both carbine_length and rifle_length buffer tubes.
The JPSCS_AR10 is designed to work in standard 7_inch M16/M4_length buffer extension tubes on .308 AR_type rifles like the DPMS LR_308. Armalite .308 rifles likewise use these standard M16 extension tubes with rifle_length stocks, so the JPSCS_AR10 will function normally when installed with the supplied spacer. However, Armalite’s .308 carbines use a slightly longer, nonstandard carbine extension tube. The JPSCS_AR10 can still be used with these extension tubes by installing the spacer, which must be modified to fit. Alternately, the system will function readily if the longer Armalite carbine tube is replaced with a standard 7_inch .223 carbine extension tube.
The JPSCS_AR10 is not compatible with the Rock River Arms LAR_8 because of its longer bolt stroke and subsequently longer extension tube.