Warning

We have strived to give you the safest AR-7 Manual possible! Please be advised however, that the entity performing any operations assumes all risk associated, including any legal responsibilities concerning devices or instructions detailed in this manual

This manual is Presented for YourEniovment. Information. Educational: or Investment Purposes Only.

The purchase or ownership of this manual constitutes a release of M&M ENGINEERING'S responsibility for injuries, property damage, or legalities incurred. Due to the wide variations in the operations detailed here and the testing procedures used in this manual, it would clearly be impossible to maintain control over any operations detailed, or their use.

Therefore M&M ENGINEERING nor the AUTHOR cannot ami Will not accept any responsibility for any instructions, devices or modifications as detailedin this manual.

2237 2230

2247

2245

2315

2315

Rifle Modifications

2243 V 2250 22421 | 2239

2231* 2238

2254

2249«I

23261

2322

2801

2330

91 O

2328 2308

2329

2251

2222

2248 2250 2244

NOMENCLATURE

PLEASE USE PART NUMBERS & NAME WHEN ORDERING REPLACEMENTS

2254 ----- Extractor Spring

2327 . Firing Pin Roll Pin

2248 -----HammerandTriggerSpring

2322 _____HammerandTriggerSpring Support Pin

2244 ____Hammer Pivot Pin

2311___Rear Sight Press Nut

2250 __Receiver Side Plate Screw

2330 _;_Safety Snap Ring

2801 ------Safety Sub-Assembly

2328 _:_Stock Take Down Screw Nut Roll Pin

2308 Trigger Pivot Pin

Charging Handle f*

Bolt Assembly

Spring Guide

Bolt Assembly

Spring Guide

Action Springs

Hammer & Trigger Hammer Trigger Spring Retaining Pin m Pivot Pin

Ejecto r Pivot Pin

Magazine

Latch

Spring

Ejecto r Pivot Pin

Magazine Latch

Action Springs

Hammer & Trigger Hammer Trigger Spring Retaining Pin m Pivot Pin

Magazine

Latch

Spring

Hammer Pivot Pin

How Make Hammer Pivot

Magazine Latch

Hammer Pivot Pin

Hammer & Trigger Spring

Ar7 Survival Rifles2250 Cut Barrel

With the Stock in your left hand, grasp the butt cap with your thumb on the serrated grip and pufl cap from the stock.

Withdraw the magazine.

Rifle Barrel
Withdraw the barrel assembly.

Withdraw the receiver assembly.

Withdraw the receiver assembly.

After Market Ar7 BarrlesRifle Bolt Drawing
Begin assembly by snapping on butt cap.

Place receiver into position and turn the take down screw clockwise onto butt stock. Periodically check screw for tightness.

Barrle Nut ThredsBolt Disassembly

Align barrel lug with the cut in the receiver and screw the barrel nut clockwise onto the receiver threads.

Check function of bolt by drawing charging handle aii the way and recheck-ing barrel nut for tightness. Periodically check for tightness of barrel nut

After market barrel of all kinds are available. But they usually don't fit into the stock, add extra weight aren't any more accurate and are expensive. But they look "COOL"?

Install the empty magazine and check that the magazine lock holds magazine in receiver. Follow all safety procedures before loading.

Rifle Barrel

BARREL DISASSEMBLY

To disassembly the barret. Use a drift punch to push the front sight from right to left, as shown. Instaf from left to right

With the front sight removed you can slip the barrel nut off. Remove the barrel nut washer. Clean and inspect for cracks, wear, or damage. Oil lightly and reassemble in reverse.

Sight PictureAr7 Rifle Parts

1 "IQIft^lq^

Begin recover disassembly by removing the rear sight screw counterclockwise, and remove the rear sight.

Begin recover disassembly by removing the rear sight screw counterclockwise, and remove the rear sight.

Barrel Extractor Cut

Make sure that the rear sight is bowed outward in the center so that the rear sight screw compress the rear sight against the receiver during assembly. Do Not remove rear sight press nut.

Remove the receiver cover by unscrewing the cover screw counter ctockwise.

Ar7 Receiver

With the pressure removed from the magazine spring by the removal of the magazine from it's cut in the receiver.

Remove the magazine & ejector pin front the receiver. The magazine lever pin is slightly shorter them the trigger pin and are not interchangeable.

Lift the extractor from the receiver. Carefully examine the extractor for cracks or deformation.

Lift the extractor from the receiver. Carefully examine the extractor for cracks or deformation.

Gripping the rear of the receiver with your left hand as shown, with your thumb on the hammer catch of the trigger and your right thumb on the trigger paw, draw up from the trigger pin, being careful not to loose the hammer & trigger spring support pin.

Remove the trigger pin from the receiver. The Magazine lever pin is slightly shorter then the trigger pin and are not interchangeable.

pp***" 25

Using your left index finger push the face of the bott in to ailing the charging handle with n*s larger opening in the charging handle slot in the receiver and slide the charging handle out. Release your finger slowly.

ASSEMBLYTIP:

When installing the bolt into the rifle the action spring guide should be placed onto the action springs, and the springs inserted into the bolt Holding the bolt down with the springs up, slide the receiver over the action spring guide, springs and bolt, making sure they slide straight into the bolt and that the springs don't kink.

Gradually release pressure from the bolt and withdraw from the receiver.

Gradually release pressure from the bolt and withdraw from the receiver.

ii Remove the action springs from the bolt

ASSEMBLYTIP:

Lightly lubricate the action spring guide, springs and the bolt to ensure free movement of the bolt during recoil. Do not use to much oil as it will promote sluggish bolt operation. Thoroughly clean the receiver and lightly lubricate ait surfaces.

Tip the receiver downward and remove the action spring guide.

Survival Rifle PartsPivot Pin Rolling Stock

Using a drift, drive out the extractor roll pin from the bolt, top to bottom. Assembly in reverse. The firing pin rati pin and the extractor roll pin are interchangeable.

Lift out the extractor from the bolt. Being careful not to loose the extractor spring.

The individual; parts should be thoroughly cleaned and inspected for wear, cracks, bent or weak springs, loose pins and bent or sticking parts. Reassemble in reverse order. Your boil will not look exactly like the one pictured here. This bolt has been lightened to shoot subsonic ammunition reliably.

Blaser R93 Bolt Face

The lower pressures experienced with subsonic ammunition will not produce the energy required to recoil the bolt sufficiently to function the AR-7 semiautomatically. Experience has shown that reducing the recoil spring wire diameter, number of coils or the alloy to allow the lower pressure ammunition to recoil the bolt sufficiently to eject the spent cartridge will not possess the required energy to strip a fresh cartridge from the magazine and fully chamber the cartridge. Therefore, the only alternative available is to reduce the mass weight of the bolt. Experienced machinist can manufacture a new bolt from a Hardenable grade of aluminum. 6061 is the least expense «id most versatile aluminum alloy. It has a very high resistance to corrosion and can be machined by all common methods. 5052 is the highest in strength, easily machined and fully heat-tractable. It's fatigue strength/ duration is higher then any other aluminum alloy and has exceptionally high resistances to chemically corrosive agents.

The reduction of weight need go no further than removal of mass weight from non-stressed areas of the factory bolt A bolt weight reduction will reduce the required recoil forces needed to operate semiautomatically. It would be inadvisable to fire standard ammunition with a low weight bolt as detailed here, the recoil forces would drive the bolt against the action spring guide at or beyond ifs designed stress limits. Breakage of the firearm, if s parts, personal injury or damage may result

But the reduction of the sound signature is so dramatically reduced when using subsonic ammunition that it is a "give and take" trade off that shouldn't be over looked. It would be wise to investigate the sound signature produced without bolt modifications by using standard subsonic ammunition before machine work on the boft begins. The sound reduction using standard subsonic ammunition is, as said before, dramatic. Please check and comply with any and all taws prior to modification of any firearm.

HOW .22 LONG RIFLE BULLETS TRAVEL DROP IN INCHES

This cartridge is intended for use against small to medium game and economical target practice.

Rifle Modifications

Rim fired percussion _3031

, 38 grains

_1400 fps 200yards

BULLET PROFILE VELOCITY_

EFFECTIVE RANGE RANGE 1 1/9 mil«

CARTRIDGE, .22 Long Rifle Only, in Hyper Velocity or High Velocity. It is suggested that you do not load .22 Long or .22 Short or any other type of .22 caliber cartridge into the magazine or into the chamber. Poor feeding couid cause property damage and or personal injury.

LENGTH PRIMER

PROPELLENT TYPE_

PRQPELLANT WEIGHT_

BULLET WEIGHT_

Rim fired percussion _3031

BULLET PROFILE VELOCITY_

EFFECTIVE RANGE RANGE 1 1/9 mil«

, 38 grains

_1400 fps 200yards

Storage

Check function by dry firing without ammunition.

TEST FIRING With the safety on.

Place 1 cartridges into the magazine, insert the magazine, chamber the cartridge. Aim the firearm in a safe direction, place the safety on fire position and depress the trigger, the cartridge should fire. Repeat as necessary.

IF IN DOUBT

Have the firearm checked by a competent, Federally licensed gunsmith.

Anytime you put away yourAR-7 it should cleaned and coated with a thin layer of gun oil. Long term storage {which I will consider over 1 year), should be preserved with a through cleaning followed by a thick crating of 80 weight (+or-) gear oil as used in automobile rear ends and manual transmissions. If underground burial is intended a suitable tube can be manufactured from 6" PVC plumbing pipe with end caps. Or use the military surplus sonar buoy shown below for under ground use, with 41/2 gallons of gear oil. Everything will be like new! Put the pistol/rifle, some ammo (SEALED SEPARATELY), clips and fifl it up to the top with gear oil. Then use a whole tube of silicon sealer around the screw on cap.

56mm M16a1 Rifle Diagram
+2 -3

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