Summary of Contents for LAGE MFG MAX-31A mk2
- Page 1 Owners Manual MAX-31A mk2 Upper Receiver LAGE Manufacturing, L.L.C. 916 E. Baseline Rd. Mesa AZ 85204 CM11-420, Rev.-...
- Page 2 NFA Warning This upper receiver is designed to be used with the SWD M-11A1 and RPB M-11A1 .380 ACP submachine gun. NFA (National Firearms Act, Title 26, United States Code) rules apply to its use and possession. It is the owners/users responsibility to comply with all local, State and Federal laws and regulations in the use of this product.
- Page 3 This allows easy controllability of fire and the ability to consistently fire single and two round bursts from the automatic setting. The MAX-31A mk2 is designed to use Suomi M31 72 round drum and 50 round coffin magazines. The MAX-31A mk2 will not function with the 36 round stick mag's which are double feed.
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Page 4: Installation
Installation Insure firearm is unloaded. Point in a safe direction. Remove magazine and pull bolt to the rear to insure chamber is empty. While holding cocking knob, pull trigger and ease bolt forward into closed position. Remove front pushpin and detach upper receiver from lower receiver. - Page 5 Make sure selector is set to "SMG". This drops the trip down and makes it easier to install the upper. Hold upper receiver with muzzle pointing down to prevent bolt assembly from sliding out. Pull and hold trigger back while installing the upper.
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Page 6: Operation
Removal Point firearm in a safe direction and ensure it is unloaded and magazine is removed. Hold gun with muzzle pointing down and remove retaining pin. Pull lower receiver back about an 1/8", then pull trigger and hold. While holding trigger back, pull lower receiver downward and back to remove. - Page 7 Due to vartiations in magazines, some magazines may be a snug fit but most will fit loosely. The magazine may have a lot of play after installation, but this will not affect functioning of the MAX-31A mk2. Extra magazines can be purchased from: Vegas Drums...
- Page 8 Cocking Pull cocking knob to rear and release. Bolt will remain open. Cocking knob has a spring return and will return forward after release. Cocking knob is non-reciprocating and will remain forward when firing. Note: Cocking assembly may slightly bind when first used. With use and lubrication, it will feel smoother.
- Page 9 Scope/Optics Rail A full length rail for mounting a scope or other aiming device is located on the top of the upper receiver. The rail profile is compatible with most scope mounts, however, square shaped recoil lugs may not work. These are typically found on quick detach, throw lever mounts such as LaRue Tactical mounts.
- Page 10 Side Accessory Rails (optional) The MAX-31A mk2 can be fitted with left and right side accessory rails for mounting additional accessories. They are installed by using the threaded holes on the sidesof the foregrip. Screw threads are #10-32. When installing the screws, use Loctite 242 on the threads and be careful not to overtighten the screws.
- Page 11 The warranty for the MAX-31A mk2 Slowfire Upper Receiver applies only to the upper receiver assembly and not any accessories subsequently attached by the Customer.
- Page 12 Use a torque wrench to tighten to 40 foot/pounds. Variable Buffer System, VBS (optional) To adjust the rate of fire, the MAX-31A mk2 is designed to use a varaible buffer system. (VBS)The VBS consists of a buffer spacer that can be placed on the bolt assembly between the rear of the bolt and the rubber buffer.
- Page 13 Cleaning, Lubrication and Maintenance NOTE:The MAX-31A mk2 upper receiver halves are secured together with screws.These are not intended to be removed for routine maintenance and cleaning. Cleaning and lubrication should be carried out per the original manual provided with the M-11A1 with the follow-...
- Page 14 surface is worn and preventing the sear from reliably engaging, discontinue use and have it repaired immedi- ately. Lightly coat ejector rod with gun oil. Insert the bolt assembly into the upper receiver. Re-install upper receiver on to lower receiver.
- Page 15 Parts Replacement The MAX-31A mk2 Slowfire Upper Receiver uses some parts that are common to the original M-11A1. All replacement parts can be purchased from LAGE Manufacturing, L.L.C. Additionally, you can purchase the following parts from any company that sells parts for the M-11A1:...
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Page 16: Warranty
The above limitation of exclusion may be subject to state law and may not apply to you. To utilize this warranty, the MAX-31A mk2 Slowfire Upper Receiver must be returned to us packaged in a manner to preclude damage during transit and with shipping charges prepaid.