Can I install a AR-15 Extended Quad Rail Handguard with FSP Cutout at Carbine Length from monstrum ? I want to be able to keep the front sight gas block and have a quad pic rail. I know it's pretty specific but if y'all do know and can help that would be awesome

Question

Trevor D. · Answer

Jake, on just about any other AR I would say yes but the Monstrum site mentions the AR556 specifically saying it will not work without modifications, the non standard bayonet lug on the front sight block interferes with this rail. https://monstrumtactical.com/ar-15-quad-rail-extended-drop-in-fsp-cutout/

James G. · Answer

Jake, this will work  :   https://www.budsgunshop.com/catalog/product_info.php/products_id/714005316      -----   it works around an A2 Front Sight Post Buddy Picture here : google.com/search?q=Leapers+UTG+PRO+AR-15+Drop-In+Quad+Rail+Extended+Carbine&source=lnms&tbm=isch&sa=X&ved=0ahUKEwjGyOuEn77iAhWGylkKHdL0B6kQ_AUIDigB&biw=1920&bih=916#imgrc=kG-MV3BLmIr1-M:

Michael W. · Answer

Jake, The Monstrom and most of the other carbine length quad rails that have cutout for the A2 front sight still need to be modified to fit around the bayonet lug. Especially on the Ruger model 8500 AR556. A dremmel or angle grinder with good cutting wheel will make cut out you need for it to fit and function.

Ask the Community