Headspace-Locking shoulder size

quicksilver · March 22, 2012, 19:45

New build Imbel gear logo receiver.
bolt will close on Go gauge with .260 pin
bolt will not close on Go gauge with .261 pin
bolt will not close on No-Go gauge with .260 pin or .261 pin
Little pinky finger pressure only and bolt is stripped & all parts clean.

Correct locking shoulder size .260 ????? Am I wrong?

**Hebrew Battle Rifle** · March 22, 2012, 20:04

Quote:

Originally Posted by quicksilver

Am I wrong?

No

quicksilver · March 22, 2012, 20:15

Thanks I followed your instructions including the little pinky thing.

**Hebrew Battle Rifle** · March 22, 2012, 21:32

Quote:

Originally Posted by quicksilver

Thanks I followed your instructions including the little pinky thing.

I thought that it seemed familiar

muttman · March 22, 2012, 21:38

I'm at the same spot too but with a .262 guage slight two finger pressure, .261 guage no pressure it almost drops in on go guage. What is the proper feel or push to drop the bolt in ? Muttman.

quicksilver · March 22, 2012, 22:07

To quote Fal Member Hebrew Battle Rifle :
Thoroughly clean your chamber.
Install GO gauge
Install smallest pin gauge into LS hole.
Install bolt carrier and stripped bolt into receiver
Place the tip of your pinky against the rear of the bolt carrier.
Push the carrier fully forward.
If the carrier fully closed, remove pin gauge and insert the next size larger. Repeat this procedure until the carrier will NOT fully close. When this happens, place the previous pin gauge back into the L S hole.
Now replace the GO gauge with the NO GO gauge. Close the carrier. If it will not close on that pin gauge with the NO GO installed, but WILL close with the GO gauge installed, that pin gauge size is the size of your locking shoulder. There is no need for mathematical gymnastics or two thumbs pressure.

If the carrier would not close on the first pin gauge, you need a smaller pin gauge

March 22, 2012, 19:45	#1
quicksilver Registered FALaholic #: 6373 Join Date: May 2002 Location: forney texas Posts: 39	Headspace-Locking shoulder size New build Imbel gear logo receiver. bolt will close on Go gauge with .260 pin bolt will not close on Go gauge with .261 pin bolt will not close on No-Go gauge with .260 pin or .261 pin Little pinky finger pressure only and bolt is stripped & all parts clean. Correct locking shoulder size .260 ????? Am I wrong?

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March 22, 2012, 20:15	#3
quicksilver Registered FALaholic #: 6373 Join Date: May 2002 Location: forney texas Posts: 39	Thanks I followed your instructions including the little pinky thing.

March 22, 2012, 21:38	#5
muttman Registered FALaholic #: 19106 Join Date: Jan 2006 Location: west,TN Posts: 311	I'm at the same spot too but with a .262 guage slight two finger pressure, .261 guage no pressure it almost drops in on go guage. What is the proper feel or push to drop the bolt in ? Muttman.

March 22, 2012, 22:07	#6
quicksilver Registered FALaholic #: 6373 Join Date: May 2002 Location: forney texas Posts: 39	To quote Fal Member Hebrew Battle Rifle : Thoroughly clean your chamber. Install GO gauge Install smallest pin gauge into LS hole. Install bolt carrier and stripped bolt into receiver Place the tip of your pinky against the rear of the bolt carrier. Push the carrier fully forward. If the carrier fully closed, remove pin gauge and insert the next size larger. Repeat this procedure until the carrier will NOT fully close. When this happens, place the previous pin gauge back into the L S hole. Now replace the GO gauge with the NO GO gauge. Close the carrier. If it will not close on that pin gauge with the NO GO installed, but WILL close with the GO gauge installed, that pin gauge size is the size of your locking shoulder. There is no need for mathematical gymnastics or two thumbs pressure. If the carrier would not close on the first pin gauge, you need a smaller pin gauge