Improved QB Breech

[SeanMP]

The basic QB breech is something that I have always wanted to tackle as an improvement upgrade project. Some recent posts and conversations finally gave me the push to get on with it.
I had a number of things I wanted to accomplish.

• Complete compatibility with all existing QB parts
• Much more positive registration on the tube
• A longer barrel socket with three points of contact to get rid of the notorious wiggle
• A real dovetail with a flat top
• The same OD as the tube to give the rifle a better visual balance

This is what I came up with

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The OD of the breech is 7/8" giving it the same OD as the tube.
The length is 3/4" longer giving a total of 2" of barrel socket. The QBD and AR barrels simply slide into a bored recess and the thinner QB barrel has a sleeve which slides onto the barrel and into the socket.
The registration of the breech to the tube is almost 3 times wider giving a very stable mounting.
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Of course the transfer port is milled for a positive sealing face.

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There are two additional setscrews placed discreetly at 120 and 240 deg to provide the three points of contact for barrel stability

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A true 11mm dovetail runs the full length of the breech and is .075" higher to provide clearance for the objective of an AO scope. On all of my QB's the AO ring bumps the barrel on medium rings. And the loading port is just a fraction bigger and beveled both ends to provide just a bit more finger room.

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Overall I think I hit all the major improvements that could be made on a QB breech

Any thoughts?

[remtom1200]

That looks perfect! Nice seeing a larger saddle and longer length.

[sholo]

LOL...Ya could of at least made it a multi-shot....

Just kiddin' ya, man..... AWESOME job! (WTH is the "drool" icon?) I'd say you covered all the bases VERY well!

Takin' orders yet?....


Todd


P.S - I see we like the same scope (even on the same power level, too!)

[Scottster]

Beautiful work! Will you be offering this in a left-handed version, too?

[SeanMP]

LOL...Ya could of at least made it a multi-shot....

Haha...Nope...I'm not that smart

Takin' orders yet?....

Not yet, I need to make a few...If I priced off a proto everything would be a $1000

P.S - I see we like the same scope (even on the same power level, too!)

Great minds Todd....great minds!

[SeanMP]

Beautiful work! Will you be offering this in a left-handed version, too?

Geez I had not thought of that but left hand is just as easy.

[rsterne]

Beautiful job.... Too bad making this stuff takes so long, huh?....

Bob

[SeanMP]

Beautiful job.... Too bad making this stuff takes so long, huh?....

Bob

It would be nice if I could dream it and then elves cranked it out while I slept.....worked for shoemakers

[Gippeto]

Very nice Sean.

Did you start with heavy wall tubing or do you like drilling/reaming deep holes?

Thoughts....hmmmm.....why not drill, tap and mount a weaver base?

Al

[SeanMP]

Al

I drilled and reamed solid 1144 stock. I find this much easier than dealing with snarly DOM stock. It was actually fairly painless.

As far as the weaver base goes I needed complete compatibility with existing QB stuff. That includes the nifty FWB 300 clone rear sight which fits on 11mm dovetail. And the option is always there to use one of the adapters that slide onto the dovetail.

Besides I'm an Anschutz guy...weaver bases are the stuff of HEATHENS