The Magpul CTR CompactType Restricted CommercialSpec Model is a dropin replacement buttstock for AR15M16 carbines using commercialspec sized receiver extension tubes, Designed for light, fast action the streamlined Aframe profile avoids snagging and shields the release latch to prevent accidental activation, The CTR also features a supplemental friction lock system that minimizes excessive stock movement for enhanced weapon stability and an ambidextrous QD sling mount that will accept any pushbutton sling swivel, The CommercialSpec Model includes an extended 0, 55 rubber buttpad to provide positive shoulder purchase and accommodates the longer, slanted back common to most commercialspec tubes, Note: There are two basic sizes of M4 Carbine receiver extensions buffer tubes: milspec and commercialspec, If you have a milspec extension on your rifle, make sure to order the MilSpec CTR, Please see the Related Info section above to determine which tube you have, Color: Black, Made in USA, Mounts on commercialspec sized carbine receiver extension tube not included from manufacturers such as Bushmaster, DPMS, Olympic, and others please see the note below, Supplemental friction lock minimizes accuracy robbing wobble, Sloping cheek weld combines a slim profile with user comfort, Shielded release latch prevents snagging and accidental operation, Premium chromesilicon lock spring provides positive locking and long service life, Side mounting slots accept optional cheek risers for NONAR15M16 applications, Replaceable 0, 55 Extended Rubber ButtPad offers an antislip surface and increases impact protection, Compatible with Magpul ASAP and other receivermount sling attachments, Sling Mounts, Rear Pushbutton QD swivel sling mount accommodates up to 1, 5 swivels ambidextrous, RearBottom 1, 25 sling loops, Toe Lanyard hole for custom paracord rigs, Optional Accessories:, Rubber ButtPad, 0, 30, Enhanced Rubber ButtPad, 0, 70:, Cheek Risers 0, 25, 0, 50, 0, 75 for NONAR15M16 applications, Specifications:, CTR, CommercialSpec stock configuration, Length, Maximum: 7, 15, LOP Adjustment Range: 3, 80, LOP, M4 Collapsed: 10, 95, LOP, M4 Extended: 14, 75, SKU: TCLGR1542