LWRC SIX8-SPR CA Compliant - Juggernaut Tactical rear takedown pin Caliber: 6.8 SPC II Barrel Length: 14.7 - 16 Weight: 6.95 lbs | 7.25 lbs Muzzle Threads: 5/8 x 24 TPI Rifling: 1/10 RH Proprietary upper and lower receivers optimized for the 6.8 spc ii cartridge LWRCI cold hammer forged nicorr-treated heavy barrel LWRCI adjustable 2 position gas block LWRCI birdcage (a2) flash hider LWRCI skirmish back up iron sights LWRCI enhanced fire control group LWRCI ambidextrous sling mount LWRCI 12 user configurable rail system LWRCI ambidextrous charging handle Fully ambidextrous lower receiver LWRCI adjustable compact stock Magpul moe+ grip Comes with picitany rail sections for attachments.