Battle Arms Development Vert 5.56mm Gen 2 PDW Stock System Black 4.8in

Battle Arms Development Vert 5.56mm Gen 2 PDW Stock System Black 4.8in. VERT buffer system is designed for 5.56mm/.223 direct gas impingement systems. Will also work on the 300BLK DI system as well but must have an appropriate gas port size. The patented VERT buffer system has been tested on industry-standard factory Colt 6920 (direct impingement) to be a drop-in stock system using factory 5.56/.223 ammunition. However due to the limitless possible configurations of the AR-15 rifle system from aftermarket components and the variety of ammunition used the rifle may be under-gassed or over-gassed for the VERT buffer system. Some adjustments or modifications may be required. The most common adjustment if the bolt fails to lock back on the last round is to open the barrel gas port diameter to increase the gas into the system to fully cycle and compress the inner buffer spring for reliable operation. An adjustable gas block adjustable gas key or adjustable bolt carrier is recommended for tuning the gas system. The VERT buffer system has been tested successfully with 300BLK direct impingement AR platforms in the semi-auto or full-auto fire. However the rifle system must be configured properly. 300BLK supersonic and 300BLK subsonic ammunition have drastically different characteristics. They will also perform differently suppressed and unsuppressed. The rifle may be tuned to function on one end of the spectrum or the other. Please do not expect the stock to run on the same rifle configuration between shooting suppressed vs. unsuppressed and supersonic vs. subsonic. Specifications for Battle Arms Development Vert 5.56mm Gen 2 PDW Stock System: Manufacturer: Battle Arms Development Color: Black Gun Model: AR-15 Gun Type: Rifle Length of Pull: 8.8 in Length: 4.8 in Condition: New Finish: Mil Spec Type III Class 2 Hard Anodized Gun Make: AR Platform Features of Battle Arms Development Vert 5.56mm Gen 2 PDW Stock System M16 BCG Compatible No Proprietary Bolt Carrier Group Required Continuous Cheek Rest for Stable Shooting Interchangeable Cheek Rest (different colors/patterns coming soon) Patented Ultra Compact Buffer & Buffer Spring Three User Adjustable Stock Extension Options: Position Quick Release (Straight Pull to Open & Depress Latch to Close) Position Lock (Depress Latch to Open & Close Position Lock (Depress Latch to Each of the 5 Positions) QD Sling Swivel Points on Butt Plate High Impact Resistant S7 Tool Steel Guide Rods Intelligent Guide Rod Lock Design Lightweight 19 Ounces (Complete Stock System with Buffer & Springs) Package Contents: Battle Arms Development Vert 5.56mm Gen 2 PDW Stock System Buffer Spring What firearm models does the manufacturer say Battle Arms Development Vert 5.56mm Gen 2 PDW Stock System is compatible with? The manufacturer says that Battle Arms Development Vert 5.56mm Gen 2 PDW Stock System is compatible with AR-15Battle Arms Development VERT-V2-PDW-556: Vert 5.56mm Gen 2 PDW Stock System Black 4.8in