Sear Spring

Start with a 10" piece of 040"spring wire. Bend it into a square "U" shape like the trigger spr ing, insert a piece of drill rod into the sear hole anil place the wire h tl groove as shown

Hold the wire ¡-.nd sear firmly and bend the wire around the drill rod as shnwn the loop end of The wire stays inside the sear groove. There should be three aim .<..

THE TRIGOm BAR

First, cut three 3 V> inch long pieces of. 130 dia drill rod laperone end nt each Then tike the trigger bar and lay it on its left side, and pin the sear, the link, and the trigger and place the actuator rod between the trigger and the link. Do this on the ou;side (ri^hi side) ot the bar

Notice the position of the sear and the link, they should fit together snug, and in tliis position, (he trigger holes should be aligned vertically, if not, make t new actuator rod until the position of the trigger is as shown

With pieces and pins and rod installed as shown, check the clearance between the sear and the link when the link is moved forward by the trigger rod. The sear must not hang up on the link. Reset the sear on the link by raising the sear up and moving the link back to contact the sear.

TRIGGER BAR ASSEMBLY PUT IT TOGETHER

TRIGGER BAR ASSEMBLY PUT IT TOGETHER

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Two useful tools are: two pieces of clothes hanger wire, 7" iong, with a pointed end. 1 Run the tool through the sear spring and sear as shown

2. With a little force, insert the spring tails and the head of the sear into the back of the bar as shown here.

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With the sear installed, put the sear link on the rod in this position and insert it into the bar.

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The spacer spring for the link goes in like this Use the hanger wire tools to align and pin the spacer and the link together.

' SWBer sf»e & If* link the ¡rigger iower hole to hold in

fjOiv ;j,e trigger looks w

;er wire tooj.

To install the trigger spring, it goes in tike this Remove the hanger wire tool and put til« sprin; in making sure that the back part of the spring fits securely into the notch in the back of the trigger. When the spring is in position and lines up, insert the hanger wire tool to hold in place until you put in the 156" (tapered end; rod. (That will become the pin when trimmed off)

Now, the bar should look like this. Check for free and easy movement of the trigger and ■ any of the parts are stiff, or do not move easily, then take some emery paper and polish th and tap litem in so that the particular piece moves easily Make si_re that all of the pieces freely. The next step is to BALANCE the springs. The seal spring exerts the most pressi trigger spring should be just strong enough to reset the trigger by itself when released and same time the sear must reset itself If the trigger will not reset itself, first check for free movement. Use emery doth to sand off and smooth the pin rod uitil free movement occu

Now clieck it out Push down of the sear with your thumb, and pull the trigger with your and the sear will drop Hold the sear down, release the trigger first, then release the sear., the sear should some up by itself if it does, your bar springs are in balance. (To strengthe spring, un coil ir, to wcasen il coil i! furilier around the rod See springs section)

This is ]io\v 3 finished I rigger bar should look

This is ]io\v 3 finished I rigger bar should look

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The back of the trigger hole is exactly 14 inches from the back end.

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This collar is made from 2" OD pipe 150" wall thickness 2 800"long Cut out a .775" section. (At this point, the bolt handle slot may be milled out to conform to the receiver ) Study this carefully before you begin. The width of the handle slot is .550" to .610" The downward portion of the handle slot is 1 435" from the back of the collar. The front of the downward portion of the handle slot is 780" from the front of the collar. Before welding the collar to the channel iron, use the receiver as a plug, secure it to the channel iron to insure alignment of the collar.

Now, insert the trigger bar into the handle frame, be sur: that it iits snug but not tight. (Make it so that the bar slides in and out easily ) Align the trigger bar, check the trigger slot for proper clearance. THEN, Al-ION THE TRIGGER BAR AT THL BACK IT MUST BR PERFECTLY FLUSH WITH THE BACK END. USE A CLAMP TO HOLD THE BAR FIRMLY AGAINST THE BOTTOM OF THK CHANNEL, THEN DRILL A 1/4" HOLE 4135" FROM THE END AND UP EXACTLY 400" FROM THE BOTTOM Use a drill press for this operation Drill through both handle frame and trigger bar. If"you measured corectly, the 1/4" drill bit will miss the actuator rod in the trigger bar Insert the 1/4" Quick pin to bold the trigger bar inside the

This is the way it should look. The back end of the trigger bar and the back end of the receiver should align up perfectly with the end of the itame handle as shown..

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This is a special cast A-3S6 Aircraft abminura handle I: and can finis!» to a beautiful luster or can be anodized any color I he center motive and irajtier hole are precision cast in, but the bolt handle sloi must be cui out and I he two Quick-Pin holes need to be drilled THs is ava lable only from JNS Supply lij (Uieck JNS for price and availability, supplier's list )

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If there is too much difficulty ir. milling out the "oval" throat of tie receiver tube, il is possible to cut the tube in two pieces by cutting at 3 606" from the back. (See the drawing, the line with a star at each end.) Allowance must be made for the blade width, the net result must conform to the drawing. These two pieces can be later rewelded together a tier the milling is complete. The edges must be beveled, aligned, and then weld together and grinc off for a smooth finish.

If there is too much difficulty ir. milling out the "oval" throat of tie receiver tube, il is possible to cut the tube in two pieces by cutting at 3 606" from the back. (See the drawing, the line with a star at each end.) Allowance must be made for the blade width, the net result must conform to the drawing. These two pieces can be later rewelded together a tier the milling is complete. The edges must be beveled, aligned, and then weld together and grinc off for a smooth finish.

Maadi Griffin Cal4140 Heat Treat Rockwell

Material 4140 steel, heat treated 10 42 ROCKWELL R'C SCALE

If there is too much difficulty 111 milling out the "oval" throat of the receiver lube, it is possible to cut the tube in two pieces by cutting at 3 606" from the back. (See the drawing, ths line wi:h a star at each end ) Allowance mist be made for the blade width, the net result must conform to the drawing These two pieces can be later rewelded together after the milling is complete. The edges must be beveled, aligned, and then weld together and grind off for a smooth finish.

THE BOLT ASSEMBLY PARI S

M16 Sear BlueprintsDrawing Plans For Trigger AssemblyCal Rifle PlansMaadi Griffin BoltDrawing Plans For Trigger Assembly

r.ii>". This is the res! stop !o le boit handle is up. It is exactly 90 degrees clockwise from th: deep

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