*Blemishes: Parts may have minor cosmetic blemishes in the coating and/or material. These blemishes are strictly cosmetic and do NOT affect function in any way. We can not hand pick parts or send pictures of exact blemishes. Blemished items are not eligible for return or exchange.

MAS Defense 4.2" M-LOK Free Float - FDE
Pistol Length

Proudly Made in USA. The monolithic top rail of the handguard sits directly against the upper receiver rail. M-LOK attachment points are located at the 3, 6 and 9 o'clock positions. The slim 1.25" inner diameter will require a slim muzzle device. This includes our "Slim" Flash can if applicable.

Weight comes in at 3.8oz for the rail itself. The rail, steel barrel nut and attaching screws brings the weight to 7.2oz. The barrel nut will accept a 1 3/16" or (30mm) wrench or crow foot.

Installation should be complete by a gunsmith. The barrel nut must be torqued to a minimum of 38 FOOT LBS. The (2) handguard screws should be torqued evenly to 40 INCH LBS with blue removeable loctite applied.