Leapers, Inc. - UTG Rail System, 7, Carbine Length, Super Slim Free Floating Handguard, Single Extended Top Rail, Black Finish MTU005SS This is the UTG Pro model 4/AR carbine length Super Slim 7" free floating handguard with proprietary attachment design and an extremely compact profile. The single extended rail forms a continuous picatinny top section. It includes 3 user detachable 2-slot rail sections for 3" 6" and 9 O'clock positions.