Dead Foot Arms Subcompact Weapon 4in Tailhook Brace for Rifle Caliber AR Platform Pistols Gen 2 Black Anodized. Collapsed length of the brace is 3.9?. While compact it is still very versatile allowing for button free deployment and 6 length of pull settings. At full extension length reaches 12.6" from trigger keeping it comfortable for shooters of all sizes. The SCW 4 Brace features an ergonomic design that uses dual rails that are offset to not interfere with weapon controls or function. System includes complete brace assembly receiver extension adjustment rail and recoil springs and plunger. System weight is 18 oz. NOTE- this product does not require a shortened M16 style BCG thus no bolt carrier group is sold with this kit. Compatible with most Rifle Caliber AR-15 pistols and rifles in calibers of: .223 .223Wylde 5.56 300 BO 7.62x39 6.8 SPC 6.5 Grendel .458 SOCOM 50 Beowulf. BCG needs to have an internal rear cavity of at least 0.62 inches in diameter to work with the MCS. For CMMG Radial Delay you will need to order the Rifle Caliber version. NOTE: When "FoldAR Upper" in the drop down is selected the SCW2.5 kit will come with a shortened bar that will not interfere with the FoldAR Upper when folded and the bar is completely collapsed. Also comes with the FoldAR SCW Set Screw and Magnet Catch. Specifications for Dead Foot Arms Subcompact Weapon 4in Tailhook Brace for Rifle Caliber AR Platform Pistols Gen 2: Manufacturer: Dead Foot Arms Color: Black Length: 3.9 in Weight: 13.9 oz Condition: New Features of Dead Foot Arms Subcompact Weapon 4in Tailhook Brace for Rifle Caliber AR Platform Pistols Gen 2: Left-handed cheek rest Dual antirotation QD Mounts Hard stop at last LOP Dual rails for added stability Package Contents: Dead Foot Arms Subcompact Weapon 4in Tailhook Brace for Rifle Caliber AR Platform Pistols Gen 2 Gear Head Works Mod 3 Tailhook Dead Foot Arms 80040: Subcompact Weapon 4in Tailhook Brace for Rifle Caliber AR Platform Pistols Gen 2 Black Anodized