Here is the solution to mounting a bayonet on an AR-15 without a quad rail or appropriately placed sling swivel stud and without resorting to a barrel clamp style. This extendable bipod from NcSTAR quickly and easily mounts to the bayonet lug on most AR-15/M4/M16 variants. A push button on each spring-loaded leg can lock into any of the notches to extend or collapse the legs independently to the desired height. The bipod head has a ball swivel joint allowing the shooter to make small sight adjustments without picking the bipod up off the ground.
Features and Specifications:
Manufacturer Number: ABABNL
Sturdy construction with notched spring-loaded legs
Non-slip rubber feet
Legs adjust independently from 8.25" to 11"
Legs fold together and move into horizontal rest position
Quick release bayonet lug mount
Weight 9.9 oz